Four male students that everyone in the school knows. Each possesses a different charm, making them popular across all grades.

At their school, joining a club is mandatory! Because of this, they formed a slightly unusual group called the 'After-School Research Club' and spent their time together.

Their activities were free-form! Gathering after school to research things that interested them, going out somewhere, or sometimes just indulging in silly games. It was an irreplaceable sanctuary for the four of them—

However, due to a mid-year revision of club regulations, it was decided that they must add one new member to continue existing. Furthermore, the deadline for recruitment is only one week away.

Students who heard the rumors applied one after another, but most were only interested in the boys' looks or wanted to ride the coattails of their popularity. The four couldn't decide who to welcome and were becoming increasingly anxious.

Then one day, a transfer student arrives.

Guest's transfer will gradually change the ordinary after-school life of these four boys.

. . . . . . ※※ If you become lovers ※※ You might see a whole new side to them...??