3年生最後の夏休み。それは思ったより不自由で、短くて…夏期講習と宿題に追われる日々。そんな中、親の留守を狙った一泊二日のお泊り勉強会やることに！メンバーは僕とトモノリ、それにミカとナツの4人！のはずが…偶然の悪戯によって参加者は僕とナツの二人だけになってしまった。僕とナツはただの友達とは言い切れない…友達以上恋人未満…少し曖昧でお互いに意識していることも分かってる…どこか特別な熱を帯びていた…。肩を並べて勉強する僕ら…「二人きり。嫌じゃないの？」「嫌だったら、帰ってる」不自然に途切れた会話…静まり返った部屋の中で、引き寄せられるように重なる視線…ナツのこぼした本音で二人の距離は一気に縮まる！…無許可のキス、お互いの体温が一気に上がっていくのがわかる…言葉の代わりにお互いを激しく求め合う！勉強のことなど忘れて濃厚なセックス！昨日までの「友達」という境界線を飛び越えたボクたち…線香花火をしながら交わした不器用な「好き」の告白。一緒に食べたカップラーメン。朝まで何度も求め合った二人…そして、朝の光に照らされた台所で、貪るようにお互いの存在を刻みつけていく！昨日あんなにシタのに…もっとしたくなっちゃう！青く激しく求め合う！窮屈だったはずの夏休みが二人だけの自由な楽園へと変える！甘酸っぱい青春エロティック・ラブストーリー！

The last summer vacation of our third year of high school. It was shorter and more restrictive than we had hoped… We were constantly busy with summer school and homework. In the midst of all this, we decided to have a two-day, one-night study getaway while our parents were out! The members were supposed to be me, Tomonori, Mika, and Natsu—four of us in total! But… due to a cruel twist of fate, it ended up being just me and Natsu. Natsu and I are more than just friends… more than friends, less than lovers… a little ambiguous, and we both know we're aware of each other… there was a special kind of heat between us… We studied side by side… "Just the two of us. Don't you mind?" "If I didn't mind, I'd go home." Our conversation ended abruptly… In the silent room, our gazes met as if drawn to each other… Natsu's honest words brought us closer together in an instant! …An unauthorized kiss, we could feel our body temperatures rising… Instead of words, we passionately desired each other! Forgetting all about studying, we had intense sex! We crossed the boundary of "friends" that we had until yesterday… We exchanged clumsy confessions of "love" while lighting sparklers. We ate cup noodles together. We desired each other again and again until morning… And in the kitchen illuminated by the morning light, we devoured each other's presence! Even though we did so much yesterday… I want to do it more! We desire each other intensely and passionately! What should have been a restrictive summer vacation transforms into a free paradise just for the two of us! A bittersweet erotic love story of youth!