From Shinnen:

Emi and Atsushi have been dating for one month now, and to be able to become one with the person you like is like a miracle. The feeling of happiness is overwhelming, but apparently, there is an unforgettable person for Atsushi. What should a person do in order to make his attention turn to one's self? An earnest love graffiti.

Other stories:

Shin Sekai
Iroha ni Hoheto
Omoware, Omou