ashita no kimi to au tame ni
Bishoujo game by Purple Software. AKA "Till I Reach Your Tomorrow"
Japanese name: ๆๆฅใฎๅใจ้ขใใใใซ
Illustrations by Kurashima Tomoyasu (as ใพใฃใดใผใใฃใ๏ผ )
Official website: http://www.purplesoftware.jp/products/asukimi/index.html