Description:

As a child, Raku Ichijo made a secret promise with his childhood sweetheart, keeping a pendant as a memento while his love took the key. He dreams of one day meeting his past love, but years later, reality smashes his hopes when Chitoge Kirisaki accidentally knees him in the face... Though Raku’s a normal high schooler, his family heads the notorious yakuza gang the Shuei-Gumi faction! And he’s dragged into family affairs when he’s forced into a relationship with Chitoge, the daughter of a rival gang’s boss! Despite their constant spats, the two somehow fool everyone with their false relationship. Raku then discovers that Chitoge has a mysterious key from her past, which she can’t remember... Plus, two other girls appear with keys as well—Kosaki Onodera and Marika Tachibana! Caught in the midst of this love maelstrom, even more complications arise for Raku when his class decides on Romeo and Juliet as the class’s play for the school festival. Can the two false lovebirds pull off the impossible and make the play a success? (Source: VIZ Media)

Description:

Fuutarou Uesugi is a poor, antisocial ace student who one day meets the rich transfer student Itsuki Nakano. They argue but when Uesugi realizes he is to be her tutor, he tries to get on better terms. While trying to do so he meets four other girls.

Description:

Jirou, a third-year in high school, is forced to live with a gal named Akari under a course called the "Couple Practical." In order to be paired with their own romantic interests, they're going to act as a married couple...!? (Source: MangaDex)

Description:

A boy who is a twin lags behind his overachieving brother in both academics and popularity. He proposes to the girl he likes, herself a twin, but had confused her for her twin sister. Embarrassed and in a compromising position, he agrees to help her to win the affections of the boy she likes, his brother, lest she leaks his botched confession to her sister, hampering his chances with his crush. (Source: MU)

Description:

Keita has two step-sisters who love him in a lustful way and have no problems expressing it, they even are in competition about that. Much to the laughs of his friends, he endures it but when one day they come to his school to give him his lunch, he gets annoyed and explodes on them, then they confess their feelings for him in front of everyone and leave. Feeling sorry he chases after them and says that he'll study hard in order to get in the same high school as them. (Source: MangaHelpers)