Chugakusei No Jumai to, Umi No Mieru Kissaten De. (MF Bunko J) [Light Novel]

[Machine Translation] Sosuke Mamiya went to an art university in Tokyo, but had reached his limit and lost his "fever" due to his life in the city. During the summer vacation of his junior year of college, he arrives in Nanato Town, a country town by the sea, to escape from the city for the funeral of his deceased relative. There, he finds a girl, Yuna Kutani, who has lost her parents in an accident and has been left on her own. ( I had decided that I would take over my mother and father's coffee shop... Please protect my dream, Sou-nii...! ) Sosuke meets his junior high school cousin, who is now bigger than he remembers, and he remembers the promise he once made. He spends the summer with Yuna at a coffee shop that holds memories of their childhood, and the love between an adult and a child begins to unfold.

東京にある美術大学に進学したものの、都会での生活で自らの限界を迎え「熱」を失っていた間宮宗助。大学3年の夏休みに、亡くなった親戚の葬儀のため都会から逃げるように海沿いの田舎町―七登町へと辿り着く。そこには、事故で両親を失い、天涯孤独の身となってしまった少女・九谷唯奈がいた。「お父さんとお母さんの喫茶店はあたしが継ぐって決めてたの...あたしの夢を守ってよ、宗にぃ...!」記憶よりも大きくなった中学生の従妹と出会い、かつて交わした約束を思い出した宗助。幼き頃の思い出が残る喫茶店で、唯奈とともにこの夏を過ごすことになり―大人と子供の恋が、今ここで動き出す。