Konayuki Fururi ~Yuzuhara-chou Curling-Bu~ Gaiden: Saeko no Kayoizuma Nikki

Main character starts to live with Saeko. At first two friends are shy about holding hands and going on their first date, but soon their flirt is noticed by the acquaintances, so relations continue openly though not without teasing. This is a happy couple communal life diary.

[From vndbreview]