Natori Hana is a meek and mild, earnest and good-natured 25-year-old who just so happens to look much younger than she actually is. In actual fact, she looks exactly like her cousin, who refuses to go to school for certain reasons. Hana takes her cousin’s place and attends high school; however, her cover is blown on her first day when it turns out that her former high school classmate, Okito Kanie, just so happens to be the school’s history teacher.

There are several similarities between 25-Year Old High School Girl and Yubisaki Kara, but the main similarity is the fact that they are both stories about adults who have relationships from early on in their youth. Hana having been classmates with Kanie is not the same relationship as the friendship between Ryou and Souma which had begun in their childhoods; however, there is the common theme of knowing each other from youth. The other aspect is the sexual component of both shows, as well as the fact that both shows have short episodes that don’t run longer than 6 minutes. The male characters in both shows also seem to be completely tone deaf when it comes to consent.

Izumi Hayato is a straight-laced and studious individual running for Student Council President; however he is completely outmatched by his rival, Wakana Ui after she promises sex-ed and free condoms among other reforms. Disappointed, Hayato settles into his role as Vice-President. Next thing Hayato knows, Ui has moved in with him in order to honour a promise that their parents made a long time ago – that their children would marry each other. Now Hayato and Ui are forced to balance their personal life with their student council roles, but is it really that simple?

Okusama ga Seitokaichou and Yubisaki Kara are stories about romantic interest in different stages of life. Okusama follows high schoolers in their arranged marriage, while Yubisaki is more about adults who were childhood friends. The similarity lies in how both sets of characters experienced extenuating circumstances which led to them living together. The other similarity which perhaps doesn’t need much explaining is how both shows are ecchi and that both shows have short episodes that run for less than ten minutes a piece.

Fukatani Mio attends a high school reunion and meets a classmate she has not seen in years – Kujou Takahide. She had always had an inkling of interest in his kind personality; however, upon realising that he’s become a monk, she sees no chance of ever getting closer to him romantically. Mio drinks herself into a stupor and walks home drunk, but she runs into the object of her affections: Kujou. He walks her home but when they get into her apartment, Kujou’s own lust for Mio takes over and they wind up spending the night together.

Another anime about old feelings coming to the fore, Mingling With a Priest and Yubisaki share a common theme of having characters with crushes from their youths. The two shows also kick start a sexual relationship between their main characters after one of them goes through some extenuating circumstances – Mio getting drunk after the high school reunion, while Ryou’s house caught fire. Both shows also feature male characters who aren’t too great with consent.

Saikawa Nano is a high school teacher who hasn’t really thought about her romantic future all that much. Her father’s friend wants Nano to have a marriage interview with his son, Takamiya Souichirou. The two spend the day together afterwards and grow more comfortable together, with Souichirou asking for her hand in marriage. When they wind up in bed together, she removes his glasses and realises it isn’t Souichirou, but one of her problem students, Kuga Souji. He explains that when he heard that his brother would be her eventual husband, Souji posed as him in order to be with her and he believes his family would approve. The problem is that a relationship between a student and a teacher is taboo, but will she resist?

Featuring an illicit relationship between teacher and student, Mondaiji is perhaps the most different premise on this list. The anime is similar to Yubisaki in how it presents a sexual relationship where the male party is dominant. There’s a dubious element to how these relationships begin and again, there’s the very prominent element of consent being missing in both shows.

Yori and Iku are fraternal twins who were very close as children, but as they aged, Yori gradually grew colder towards his sister and distanced himself as much as he could. The reason is because he can’t sleep knowing he is in love with his sister and he tries to curb his desire for his sister by having sex with her best friend. Yori even decides to attend a boarding school in another town to distance himself even more; however, when Iku starts talking about having her own desires for romance in general, Yori’s desire for her takes over and he confesses his feelings. Iku wants her brother to stay by her side, but Yori wants his sister to be his lover.

I’m in Love With My Little Sister has similarities to Yubisaki in the way in which the relationship between the main characters is one that has developed over a long period of time. Both sets of characters have known each other since their childhood, although the difference this show is how the relationship has the added element of being between siblings.

Kominami Shizuka is a quiet college student who decides to attend a mixer. She meets Kirishima Ryou, an extraverted and confident woman who becomes her friend. After the mixer, the two spend the night drinking and talking. Now drunk, the two head to Ryou’s apartment and Shizuka finds herself being seduced by her new friend, who turns out to be a man! They spend the night together and the next day, Shizuka wakes up to a note from Ryou promising her more sexual encounters between them.

Another show illustrating a sexual relationship under dubious circumstances, Beast in the Skirt shows something rather spontaneous as opposed to the childhood friendship present in Yubisaki. Yet again, a lack of consent in the initial sexual encounters is common to both shows. The other similarity lies in the fact that both shows have very short episodes, both being less than five minutes long.