.Yatarou is a high school student who has two close friends, Honoka and Hinata. Hinata, who had moved away while they were in elementary school, comes back to visit, and the three of them decide to spend time together while she's in town. As the days go by, the girls become possessive and clingy towards Yatarou...
Yanderella includes the following tropes:
- Aggressive Submissive: Honoka is a Tsundere who's actually pretty nervous about her first time with Yatarou and lets him take control of the situation.
- All Girls Want Bad Boys: Yatarou is a bit aloof and has a rebellious attitude, but Hinata and Honoka are attracted to him.
- An Arm and a Leg: Hinata hacks off Yatarou's limbs with a katana in True End 2.
- Anguished Declaration of Love: If the bunny is given away to one of them, the girls will make some sort of confession to Yatarou on the third night. He can either acknowledge it or ignore it.
- Ax-Crazy: Obviously, both of the girls are insane and violent. They're unable to cope with the possibility that Yatarou would choose the other girl and are more than willing to kill their rival and him if it ever happens.
- Betty and Veronica: Hinata and Honoka, respectively.
- Big Bad Ensemble: Depending on the ending, either Hinata or Honoka will go Yandere and Murder the Hypotenuse and Yatarou as well.
- Breaking the Fourth Wall:
- In Hinata's ending, she says that everything is "just an illusion," and that he can just go back and do it all over again.
- In Honoka's ending, she calls you out on thinking that you can just start over from a bad ending as if your previous choices had no consequences.
- Bring My Brown Pants: Yatarou soils himself on Day 2 when Hinata shows him a manga volume about a love triangle between two girls and a guy.
- But Thou Must!: Some of the dialogue has Yatarou trying to refuse to do certain things like going out with the girls to the arcade or accepting the picture from the photo booth. He ultimately does both after Honoka argues with him over the choice.
- Childhood Friend Romance: Gone horribly wrong. Both girls grew up with Yatarou and spent a lot of time together. However, after Hinata moved away, a strain was placed on the relationship. Years later, the girls try to get closer to Yatarou, which will turn them into rivals. If he attempts to choose a girl he should give the bunny to, it will make the other angry. Hinata's ending even reveals that Yatarou promised to marry her when they were older.
- Childhood Marriage Promise: Young Yatarou promised to marry Hinata before she moved away, which he doesn't recall until she murders him.
- Clueless Chick-Magnet: Deconstructed. It's implied in the so-called "Bad End" that Yatarou is well aware that both Hinata and Honoka have a crush on him, but also knows the deadly consequences of picking one over the other and feigns ignorance of their attraction to him, being careful not to play favorites as to maintain the status quo.
- Color-Coded for Your Convenience: Hinata is blue, Honoka is red/violet, and Yatarou is yellow.
- Curtains Match the Window: Hinata has blue hair and eyes and Honoka has red hair and eyes. Subverted with Yatarou as his original hair color was grey before he dyed it blond to match his yellow eyes.
- Entitled to Have You: Both girls are very possessive of Yatarou. In Honoka's ending, Hinata claims that Yatarou is hers now and that Honoka should just give up. In Hinata's ending, Honoka has a conversation with her Split Personality and agrees that she shouldn't worry about Hinata anymore.
- Failure Is the Only Option: You can pick a girl and end up getting both her and yourself killed, or do nothing and just go on the same way you have been, but saddled with the knowledge that both of your childhood friends are batshit insane.
- Fanservice: On the fourth day, Yatarou can undress the girl of his choice down to her underwear. It would have gone further had they not been interrupted. Violently.
- The Fellowship Has Ended: After Hinata moved to Tokyo, Honoka and Yatarou became more distant. Honoka's ending reveals how hard this was on her.
- Fiery Redhead: Honoka. She tends to get angry pretty easily, but regular visits to the pier shows her softer side.
- Four Is Death: The fourth day title card has blood dripping from it. It's on this day that the girl you've spurned attacks and kills the other, before killing you.
- Genre Savvy: If Yatarou chooses to keep the stuffed rabbit for himself. He correctly realizes that openly choosing one girl will result in the other one going completely insane, and thus elects to ensure that this won't happen by keeping both girls happy.
- Golden Ending: The one in which you keep the stuffed rabbit for yourself. The game calls this a "bad" ending, but it's the only ending where neither of the girls snap and nobody dies.
- Groin Attack: Honoka castrates Yatarou with a pair of scissors in True End 1.
- Implacable Woman: Hinata chases Yatarou through the streets and a forest, and unlike the poor guy who ends up panting a lot after running as fast as he could, she doesn't get tired at all.
- Innocent Blue Eyes: Hinata has blue eyes and is initially seen as a sweet and innocent girl. However, both True Ends subvert this by proving that she's not be as sweet and innocent as she appears.
- Jump Scare: In True End 2, just as Yatarou and Honoka are about to have sex, Hinata attacks. Unlike the first True End, there is no warning that Hinata was there and the sound effect might catch the player off-guard.
- Luminescent Blush: Honoka and Hinata both a small blush on their cheeks. This disappears when they go Yandere in the True Ends.
- Multiple Endings: Three; the ending you get is determined by what you decide to do with the stuffed bunny. There's one ending for each heroine; they both involve your love interest getting killed by the girl you spurned, and then you meet your own untimely end. If you decide to keep the stuffed bunny, you get the so-called "Boring End" in which you and your two friends continue on as you were. Everyone gets to live, but you still have the knowledge that either of the girls are probably on the verge of snapping at any moment.
- Murder the Hypotenuse: In both True Ends, the girl you choose is killed by the other. And so are you.
- Never My Fault: Both girls blame Yatarou for the other girl dying and Yatarou’s life being threatened.
- Noodle Incident: According to a diary found in Yatarou's parents' room, Yatarou's mom used to be a Magical Girl.
- Not Good with Rejection: What triggers either True End is the other girl over-analyzing the choice of a stuffed bunny.
- Not Quite the Right Thing: Keeping the stuffed bunny will result in the Bad End where the story just ends right there although considering what happens in the True Endings, this might just be the default Golden Ending.
- Out with a Bang: On the fourth day, the girl you choose and Yatarou will attempt to have sex. Then the other girl will murder her out of jealously.
- Pink Is Feminine: Hinata is a feminine girl and has pink undergarments.
- Psychotic Love Triangle: Both of Yatarou's "love interests" are possessive, insane, and murderous.
- Red Eyes, Take Warning: Honoka, depending of which True End you get. In the first one, she finally snaps and goes on to kill Hinata and snips off Yatarou's genitals. In the second one, she has a conversation with what may be a Split Personality or her Yandere side, which convinces her that Yatarou is now hers and she shouldn't worry about Hinata anymore.
- Shout-Out:
- The plot is possibly one to School Days, primarily the official anime ending where Makoto is killed by Sekai and then decapitated by Kotonaha who kills Sekai.
- Each True End is done in a style that mirrors the end of Aoi's route in nitro+'s You and Me and Her where Miyuki had become aware that she was in a visual novel and called out the player for daring to pursue another route when they had completed hers. Just like her, they demand that the game be done again so that the right choice can be made.
- Stepford Smiler: Both girls are Types A and C, hiding both their depression and their psychotic nature.
- Hinata's end suggests that for her whole life, she put on a smile to hide her pain. She compares herself to Cinderella with the belief that she's never allowed to have any fun because of her family.
- Honoka to a degree. She's loved Yatarou since they were kids. When Hinata moved away to Tokyo, Honoka attempted to use that time to get closer to him. However, Yatarou seemed to be annoyed with her whenever she came over to his house. She chose to endure the pain she felt just because she wanted to be with him. Hinata's True End even implies that she has a Split Personality, which is never fully explained.
- Their First Time: Hinata and Honoka say this on the fourth day when Yatarou attempts to have sex with one of them. Too bad it's their first and last time.
- Tomboy and Girly Girl: Honoka and Hinata respectively.
- Too Dumb to Live: When Yatarou is running from the Ax-Crazy Hinata, he decides the best decision is to run into the secluded forest...instead of, you know, into one of the many buildings he passes, where there would presumably be someone who could help him.
- True Blue Femininity: Hinata has blue hair and eyes and is shown to have a soft feminine personality.
- Tsundere: Honoka is a Type A, being very harsh and having difficulty expressing her feelings for Yatarou. If he chooses to visit her instead of Hinata, she will show her softer side to him. On the first night, she will try to deny having any feelings for him. This is supported by night two's interactions where she gives him cookies and claims that she made them for his mother, not him.
- Woman Scorned: Either girl develops this attitude. Honoka because she loved Yatarou for so long and was always there for him, and yet, he chooses Hinata over her. Hinata because she developed an unhealthy obsession with the Cinderella fairy tale and believed that she deserved some happiness for once in her life. She even believed that Yatarou would throw her away once he was done with her and thus, killed him.
- Yandere: It's even in the title. Both girls loved Yatarou since they were little. When Hinata is forced to move to Tokyo, she still maintained feelings for him and hoped that they can be together in the future. In fact, when Hinata appears at the station, she declares herself to be his bride and almost kisses him when she gets ready to explain the reason for her return. Honoka tried to maintain her friendship with him and hoped that they would become closer without Hinata there, but she felt as if he was annoyed by her presence, which hurt her feelings. If either of the True Ends are triggered, the girl you don't give the bunny to will get upset and reflects on her life. The next day, she goes over to Yatarou's house where she kills her rival and knocks him out. When he comes to, she's able to convince him that they're dating. When they get ready to kiss, he sees what remains of the other girl and she goes on to kill him out of the belief that he will make the right choice next time.
