Tedama ni Toritai Kurokiya-san

Synopsis

Kurokiya Ruu is on the verge of repeating a year so her childhood friend steps up to teach her: his name is Tadashi Tadao (name literally translates to straightforward man). However, they end up not getting any studying done as she uses this situation to try and seduce him at every turn. The story of a girl who wants to get her crush flustered and the straightforward guy who won't get embarrassed.