Aonatsu Line

Aonatsu Line is a Japanese adult romance visual novel which takes place in the heat of summertime.

The player takes on the role of Tatsumi Oikawa, a student who remains close with his childhood friends, Chihiro Sakaki and Miki Kousaka, as they attend high school together, with the monotony of classwork often causing them to fantasize about how they will spend their summer vacation. After their friendship group is joined by transfer student Yui Nakategawa and the kouhai Kotone Shiino, the summer finally arrives, and with it, so do opportunities for deeper relationships and new beginnings.

Depending on the player's decisions, the story may branch into a route for one of the three heroines (Miki, Yui, or Kotone).