“我想在一个不知道我是黑帮孙女的高中里，作为一名普通高中生享受青春，拥有一份正常的爱情！”一咲是这么想的，但不知为何，她的看护人宇藤启弥决定以一咲的同学身份与她一起入学……“一咲小姐谈恋爱还为时过早！”启弥赶走了接近她的男人，一咲很生气。麻烦的高中生活始于过度保护和爱管闲事的看护人兼同学。

Isaku tries her best to get over Keiya, and she finally starts to make a new friend. But when she sneaks out to karaoke with her new friends, she learns that not all friends are what they appear to be.

Isaku is frustrated with Keiya when he doesn't even try to pass his tests at school. They agree that she'll give him a reward if he passes his next make-up exam, but the reward he asks for is nothing Isaku could have expected.

Isaku, Keiya, and their class go on a trip to the beach. Isaku continues to grapple with her feelings for Keiya, but there seems to be danger lurking around every corner lately.

Isaku is kidnapped by members of the Kodan-gumi, and Keiya has to save her. Although Isaku's summer break comes to an end, Keiya tries to make up for lost time with an in-house summer vacation getaway.

Isaku is super bored after finishing her summer break homework, so Keiya suggests going to a festival together. Is it a friendly outing, or is it a date?!

Isaku and Keiya meet Mikio, the grandson of another yakuza gang's boss. They're not fans.

With Keiya unable to act while Mikio has a knife at Isaku's throat, it looks like both Keiya and Isaku are at Mikio's mercy. But when Mikio attempts to sexually assault Isaku, she doesn't play the role he scripted for her.

As Mikio exits stage left, another wrinkle in Isaku and Keiya's relationship enters stage right.

After what Keiya told her, Isaku needs to make a decision about what to do next. But who can she go to for advice?

Isaku works up the nerve to confess her feelings to Keiya, and not only is Keiya's response upsetting, but he also almost kisses another girl at school the next day. Isaku's friends try to give him advice on how to rectify his mistakes.

Isaku recounts her life and the past year with Keiya. Although things are awkward at first, the two are able to make up.