 One : Kagayaku Kisetsu e is Tactics ' third title , after Moon and Dōsei . One 's production was headed by YET11 , the pseudonym of Tsutomu Yoshizawa , who also contributed to the music in the game . Planning was led by Jun Maeda , who worked on the scenario with fellow writer Naoki Hisaya . Maeda wrote the scenarios for Mizuka , Rumi and Mayu , while Hisaya wrote the routes for Misaki , Mio and Akane . Art direction was done by Itaru Hinoue who also worked on the computer graphics along with aritsts Miracle Mikipon and Shinory . In addition to YET11 , the soundtrack was composed by Shinji Orito , OdiakeS , M.S. and Ishisan . 
