Class de Nibanme ni Kawaii Onnanoko to Tomodachi ni Natta 5 (Kadokawa Sneaker Bunko) [Light Novel]

[Machine Translation] The second cutest girl in class" Umi Asanagi and I, Maki Maehara, were thinking about a "lovers' trip" before the Golden Week holidays. However, as high school students, we are not allowed to be alone together yet, but Umi's parents have a proposal for us. I'm going to accompany her on her trip to her parents' house in a hot spring resort! It's been almost six months since I started dating Umi, and I thought we were doing well as lovers... But I think it's time for us to take our relationship one step further, don't you? While they are in agony, they take a walk alone in a hot spring resort, play in the river, and go to an open-air mixed bath, and the excitement never stops! On the other hand, Riku, Umi's older brother, is acting strangely. He seems to have some feelings about his reunion with his childhood friend, Shizuku...?

『クラスで二番目に可愛い』朝凪海と俺・前原真樹は、ゴールデンウィークを前に“恋人旅行”について思いを巡らせていた。とはいえ高校生同士、まだ二人きりは認めてもらえないけど―海のご両親から提案が。温泉街にある実家への里帰りに、俺も同行することに!海と付き合い始めてもうすぐ半年、恋人としては順調のはず...そろそろ、もう一歩踏み込んだ関係になっていいのでは?悶々とした感情を抱えるなか、二人きりの温泉街散歩に川遊び、そして混浴露天風呂とドキドキが止まらない!?その一方で海の兄・陸さんの様子が妙におかしい。幼馴染・雫さんとの再会に、思うところがあるようで...?