Ayumu Inou
The protagonist from Large PonPon game, a son of Tomaru and Moegi Inou's and the father of Taisuke. Youko's older brother.
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Adorkable - Absurdly Youthful Father: To Midori and Miki of Pure Mail.
- Black Comedy Rape: If Ayumu "pursues" the Head Nurse (Arisu Takatsukasa).
- Brother–Sister Incest: Two of his love interests, Yukari Nagawa and Touri Sawagoe, are actually his half-sisters.
- The child that Kagura is pregnant within Summer Radish Vacation? It's his.
- Child by Rape: His children with Asagi and Arisu would be this given that he was the Sex Slave of the former, and the latter either forced him into sex or drugged him.
- Dark and Troubled Past: Even he has one too. Being taken away from his beloved mother, Moegi, at a very young age and subjected to various sexual torments from his aunt, Asagi (and her friend, Mrs. Sawanaga), because she saw Tomaru in him. Being separated from his childhood friend Yukari was the icing on the cake.
- Date Rape: Can be on the receiving end of this if he eats the drugged cake Arisu offers him. She still forces herself on him even if he rejects the offer.
- Lady, He's Like, in a Coma!: If the aforementioned Date Rape happens.
- Happily Married: With any of his heroines if he chose only one of them. Canonically, he eventually becomes this with Rurika.
- Heroic Bastard: Same deal as Makoto and Shun, as despite that his mother Moegi was considered by Tomaru to be his "favorite", nothing stops him from digging the Sawagoe Family's fortune from Tomoe.
- Hero of Another Story: He is from the first game of 0verflow, Large PonPon.
- Incest Is Relative: A horrific example, since his aunt Asagi, kidnapped and raped him when he was a child.
- Kissing Cousins: With Midori Nagawa, since she's his aunt's daughter...by him.
- Knight in Shining Armor: To Satsuki Shigehara. After all, he's the one who stopped her from committing suicide as she's so tired of being ill in the hospital.
- Like Father, Like Son: Taisuke really did inherit his Not So Harmless look.
- Also in relation to his own father, unwittingly or not, as both have impregnated half-sisters and daughters.
- Morality Pet: To his father, Tomaru. In fact, he's probably the only one among Tomaru's sons that he doesn't treat like shit.
- Official Couple: Arguably with Rurika. Officially as of Quiz DE PonPon
- The Paramour: He's one to Touri, who is married to his half-brother, Tomomasa. Gets upgraded to husband if he managed to convince her to leave Tomomasa and be with him.
- Parental Favoritism: Ayumu is this to Tomaru, likely due to his resemblance to Moegi, Tomaru's "favorite."
- Parental Incest: Ayumu had a child with Midori Nagawa, who is one of his daughters with Asagi. Since Asagi is also his aunt, that would make Midori his cousin as well.
- Rape as Backstory: His aunt, Asagi, took him away from his mother when he was a child and used him as a sex slave, turning him into a mindless beast. He was saved by Moegi and Kagura.
- Really Gets Around: Don't let his innocent face fool you, this guy really gets around.
- You can subvert this trope by having him dedicated to one girl, though.
- Salary Man: His profession.
- Sex Slave: Was forced into becoming one for his Aunt Asagi.
- Shotgun Wedding: Subjected to one from Rurika, who discovered that she was pregnant with their child after breaking up with him to pursue her career in Paris and came back to have him take responsibility. This caused him to be scared about having a child and hesitant in recognizing the child, which angered Rurika.
- Strong Family Resemblance: Compare him to his mother, Moegi.
- Victorious Childhood Friend: If he chooses Yukari.
Tomomasa Sawagoe
Tomaru's only legitimate child, the son of him and his wife Tomoe. Husband of Touri Sawagoe, and half-brother to Shun, Kei, Makoto, Ayumu, and Kuu.- Brother–Sister Incest: His wife Touri is his half-sister via their father. Unlike other more infamous cases, like Shun, there is no indication that either he or Touri are aware of this, as it appears Touri was raised by her mother and her husband and Touri doesn't even know that Tomaru is her father.
- Cuckold: Poor Tomomasa got cuckolded by his own Father, who raped his wife when she sought advice from him. Touri subsequently had a child, and he had no idea it wasn't his. Touri later cucked the husband of her own accord by starting a relationship with Ayumu, another of their half-siblings, and having three children by him as well. To add insult to injury Ayumu can convince Touri to leave Tomomasa and get with her in the games. Thankfully, this didn't happen canonically.
- Heroic Bastard Completely averted. He is the only one of Tomaru's children who is completely legitimate.
- Only Sane Man: In a fit of dramatic irony, Tomaru's legal son is the stablest of all his children; he doesn't have problems controlling his libido or have fifty lovers, and he seems relatively sane and undamaged as an adult. Aside from Youji of MISS EACH OTHER, Tomomasa is literally the ONLY sane man in the incest family tree that is the Overflow universe.
- Sexless Marriage: Tomomasa and Touri are unfortunately going through this and it's straining their relationship.
