His more-than-friends, less-than-lovers cousin is so cute that he could die!!!!? Nozomu is a boy staying at his uncle's house over summer vacation. In the countryside, where there are no convenience stores, or any busses even, the boy has a problem. That problem is his younger cousin, Sou! He's being lead around by this tanned energetic girl day after day and can't show her the dignity befitting his older age! On top of that, whether intentional or not, he's getting flustered by Sou's inviting demeanor. Eventually, Nozomu couldn't take his eyes off Sou and is falling more and more under her spell...!!? With a "cousin" like this, his reason is having a hard time hanging on! This is a romcom with a guy who's going under from all his tanned cousin's teasing!

友達以上恋人未満な従妹が死ぬほど可愛い!!!!?

夏休みの間、叔父の家に過ごすことになった少年・望。コンビニもない、バスも来ない、ないない尽くしの田舎で彼にはある悩みがあった。

その原因は「従妹」の爽!! 褐色元気っ娘の彼女に毎回からかわれては年上の威厳を見せられないでいた！ しかも、天然なのか意図的なのか分からない爽の誘ってくるような仕草にドキッとする始末。いつしか、望は彼女のことが目を離せず、ドンドン爽に攻略されていって……!!?

こんな「従妹」がいてくれたら理性が持たない!? からかい上手の褐色従妹ちゃんによるお兄ちゃん攻略ラブコメ!!!!!