ashita_no_kimi_to_au_tame_ni
Bishoujo game by Purple Software. AKA "Till I Reach Your Tomorrow"
Japanese name: 明日の君と逢うために
Illustrations by Kurashima Tomoyasu (as まっぴーらっく． )
Official website: http://www.purplesoftware.jp/products/asukimi/index.html