The Gal Who Was Meant to Confess to Me as a Game Punishment Has Apparently Fallen in Love With Me

Story:

As punishment for losing a game of cards, Barato Nanami, a toned-down version of the girl at the top of the school pecking order, has to confess to a male in her class. Misumai Youshin, a loner with no friends, was picked, but he is aware of the punishment! It was supposed to be a game punishment, but will Nanami develop affections for Youshin…?