縁と音海。言葉が無くても通じ合う2人。これは2人がまだお互いの気持ちを自覚する前の物語…。「ディア・グリーン」シリーズ。 Eight years ago, Yajima and Outomi met in high school, through Ryouko, Yajima's best female friend and Outomi's girlfriend at the time. Ryouko remained in their home town, but Yajima and Outomi moved to Tokyo and remained close friends through university, and after Yajima dropped out. Yajima feels comfortable with Outomi—unlike with his girlfriend. Then one day Outomi kisses another guy just to see what it would feel like, and Yajima gets agitated beyond what seems reasonable for even a close friendship.

友人として、恋人として、ずっと一緒にいた縁と音海。同居してから数年、久しぶりに一緒に帰省するがそれぞれ、家族や将来のことに直面する。それでも「互い以外は考えられない」と気持ちを確かめ合ったふたりは――。長期連載の人気シリーズ、遂に完結！