Lavender

To clean up after his friend, the "demolition maniac," causes trouble, Hagiwara Kenji is forced to climb over an iron gate and scrub toilets, where he meets Mizuguchi Kana. Though they like each other, the two get stuck in a "confessing will kill me" stalemate, leaving everyone around them wanting to tie them up and drag them to the marriage registration office.

Marriage Registration Office: I'll come to you myself. Please just get married already.

P.S. This is a bonus story for one of the author's longer works. It has a bad ending, so read with caution.

Theme: If you like someone, you should tell them.