Nanka Mou Aaa tte Kanji.

Moriya is a caring, loving boy with a strong feeling of morality and is adored by everyone. During the night of their school camp, he and his classmates decided to play the king's game. Tada, who tends to skip classes despite his excellent grades and no one knows what he's thinking, was chosen to be punished for "to spend a day as lovers"...?! A heart-throbbing youthful love story between a charismatic boy and an honor student who is clumsy but devoted when it comes to love. (Source: Sankosha, translated)