Moe Koi Restoration! ~We're the JK Shinsengumi!~

As long as we don't recognize you, you can't become the Emperor's fiancé for even a day!!
The typical ordinary protagonist, Tsubasa Mita (みた つばさ) ♂, has perfectly average grades in both academics and sports.
He has no noteworthy special skills, and his only hobby is watching horror movies. He often thinks to himself that he is the epitome of an ordinary person.
No, there is one thing that sets him apart from ordinary people. That is the huge debt his parents left him. With a sense of responsibility that is above average, Tsubasa barely makes ends meet by working numerous part-time jobs.
However, one day, a turning point arrives. He is suddenly told that he is engaged to a prestigious family.
It seems that his long-deceased grandfather once saved the head of that prestigious family, and at that time, they made a promise to each other. It is also guaranteed that if he agrees to this marriage, they will find a way to resolve his debt problem.
And so, it is decided that he will transfer to 'Gosho Academy,' where the head of that prestigious family serves as the chairman.
His fiancée attending Gosho Academy, Kurumi Mikado (みかど くるみ), is a spoiled young lady and an incredibly cute girl.
Snow melts and spring comes—before the fantasizing Tsubasa, an unexpected situation unfolds—
A group of women blocking his way with style, the Emperor's personal guard, the Shinsen-gumi.
"We won't let someone we don't recognize become the Emperor's fiancé!"
And so, in order to be recognized as the fiancé, Tsubasa joins the Shinsen-gumi.
Kurumi Mikado's first night must be magnificent, affectionate, and ecstatic—
H-training disguised as fiancé training, handled entirely by the Shinsen-gumi!? Moreover, these bodyguards of Kurumi are a group with slightly loose screws!?
Add to that the opposing faction led by Tatsuko Sakamoto (さかもと たつこ), and it escalates into a full-blown melee! Is there not a single normal person in this academy!?
As a candidate fiancé for Kurumi and a new member of the Shinsen-gumi, can Tsubasa raise his standing in the academy and safely become Kurumi's fiancé?