- Designated Hero: Rin both before and after his memories of Shion awaken. He starts as a bratty kid that bullies Alice when she babysits him, to the point that she hits a Rage Breaking Point and smacks him, which leads to his near-fatal accident. When Shion's memories arise and he realizes Alice is Mokuren, he does all he can to awaken her while lying that he's Shukaido and starts manipulating everyone to destroy the moon base, ostensibly to protect the Earth from it. While Shukaido giving him the vaccine so he would live while his friends died is a What the Hell, Hero? moment for Shukaido, Shukaido's reasons were righteous fury that Shion allegedly raped Mokuren and pressured her into an engagement. Shion doesn't deny that he "violated" Mokuren just because he could. Why is the audience supposed to be rooting for this guy again?
- Esoteric Happy Ending: Rin/Shion gets everything he wants and marries and has kids with the girl he raped and abused while leaving Jinpachi/Gyoukuran heartbroken, and this is supposed to be a happy ending.
- Fridge Logic: Okay, so we know the moonbase is continually resupplied by drones clandestinely sent to Earth. This must also be where they get the manga they're reading from.... but their race is only the size of a human's thumb. Are the drones shrinking the manga for them?
- And what exactly were they going to do if they'd evacuated to Earth like Shion wanted? Hook up with The Littles?
- Ho Yay: Jinpachi and Issei has one when Issei kisses Jinpachi after the latter admits his feelings for Alice right in front of him. And although they talk and decide to be just friends afterwards, sometimes Issei is still a bit jealous when Jinpachi expresses his love for Alice.
- Squick: The abusive, borderline possessive, relationship that develops between Alice (who's 16) and her neighbor's 7-year old son Rin.
- Not only is he a gradeschooler, he's a bratty kid who verbally maligns Alice at every opportunity, all while using their past life memories to guilt-trip her into being his girlfriend. It gets to the point where Rin begins dictating who she's allowed to speak with and when, with Alice reluctantly doing as she's told.
- Boku wo Tsutsumu Tsuki no Hikari is a manga only sequel series, set 15 years later. By this time, Alice and Rin are married with two children. Rin was 16 when their first child was born, meaning, he was 15 at the time he impregnated Alice (who was 24). That the manga portrays him as a loving husband and father while forgetting all the crimes he committed did not sit well with some people.
- The Woobie: The series heaps constant misfortune on Alice. She was used and raped by Shion in her previous life, only to end up blackmailed into an engagement with his reincarnation in her present life. Then she has to put up with how he mistreats her, while turning her back on Jinpachi and marrying and raising a family with her abuser in what is supposed to be a happy ending.
- Too Bleak, Stopped Caring: It becomes apparent by the fourth episode that there's nothing Haruhiko and the others can do to stop Rin. Haruhiko eventually turns to "M" for help, only for M to get soundly defeated and only escaped with his life because Rin let him go. Which is likely when many will stop watching because there's no one else to root for.
