When did my life unexpectedly gone wrong?

Deserted by his father, Kitsura Kiyoshiro was taken by his grandparents as well as her sick mother upon growing up he lived in the countryside with her grandparents, after graduating junior high school, he got an invitation from a popular academy called "kirazukawa Academy" he has no reason on rejecting because the one who sent him the invitation was his own father, having no friends at his first school-year he moved into second year and his identity revealed, non-ending challenges is raining at him while he has a clubroom, he was force into making one actually, and it's named..... "No activities Club" He's not the type to do actions about the rumors spreading but some of them force him to remember his own tragic past that made his mother sick by himself and his fater was the cause...... What could it be?