【登場人物】・音（おと）→地雷系女子大生でヤリマンに見えるが経験人数1人だけの彼ピに一筋な恋愛脳メンヘラちゃん・コウタ→音と幼なじみの童貞大学生でデカチンだけが唯一の取り柄・レイくん→音の彼ピでメン地下アイドル・おじ→レイくんが連れてきた中高年童貞おじさん【STORY】「音」と冴えない陰キャ童貞の僕はお互いの部屋を自由に行き来するほどの幼なじみで大学生になった今もその関係は続いている。実は最近そんな「音」に人生初の推しピ（彼氏）ができてゾッコン中。ある日、僕の部屋で無防備な姿でゴロゴロする「音」の無自覚パンチラ誘惑にムラムラしてしまう。そんな僕をからかって笑う生意気な「音」が調子に乗りすぎてるから興味本位の軽～い気持ちで自慢のデカチンを即ハメしたらまさかあんなことになるなんて…【こんな人にオススメです】・地雷系ぴえん女子が好き・幼なじみ同士BSS.NTRが好き・普段は強気なメスガキが○○堕ちすることにゾクゾクする・女の子の色んなイキ顔やイキ方が見たい・見下しバカにしてた男の子に調教されオナホになるギャップが見たい・童貞やデカチンや即ハメが好き・剃毛パイパンが好き・ストーリー性のあるAVが好き・なんだかんだ最後はオナニーで満足したい

[Characters] ・Oto → A seemingly promiscuous college girl with a "landmine" image, but she's a love-struck, mentally unstable girl who's devoted to her boyfriend, who's only had one sexual partner. ・Kouta → Oto's hood friend, a virgin college student whose only redeeming quality is his large penis. ・Rei-kun → Oto's boyfriend, a male underground idol. ・Oji → A middle-aged virgin man brought along by Rei-kun. [STORY] Oto and I, a dull, introverted virgin, are hood friends who can freely come and go from each other's rooms, and that relationship continues even now that we're college students. Actually, Oto recently got her first ever boyfriend and is head over heels for him. One day, Oto is lounging around in my room in a defenseless state, and her unconscious panty flash tempts me, making me feel aroused. The cheeky "Oto" who used to tease me and laugh was getting a little too cocky, so out of curiosity I casually decided to give her my big cock and have a quickie, but I never imagined that would happen… [Recommended for people who:] ・Like girls who are prone to crying and sadness ・Like hood friends BSS/NTR ・Get excited when a usually strong-willed girl falls into depravity ・Want to see different orgasm faces and ways of orgasming from girls ・Want to see the contrast between a girl who used to look down on and make fun of a boy and is trained and turned into a sex toy ・Like virgins, big cocks, and quickie ・Like shaved pussy ・Like AVs with a storyline ・Ultimately want to be satisfied by masturbating