I can't believe that my younger childhood friend who lives next door to my parents' house is my "sweetheart "..! The main character, Kimiko's " sweetheart" is "Tattoo," a male video streamer who streams lightly erotic video on a video site. After work, Kimiko is healed by listening to the voice of her "sweetheart" every day. One day, however, her apartment was burned down in a fire, and she had to return to her parents' house in a hurry. While at home, Kimiko is listening to "Tattoo's" delivery, but for some reason, she hears the same voice as her guess from the house next door. ......! This is a high-tension love story that begins with a slightly naughty reunion 実家の隣に住んでいる年下の幼なじみが、私の“推し”だったなんて──！ 主人公・きみこの推しは、動画サイトでちょっとエッチな配信をしている男性配信者の“たっつー”。 きみこは仕事が終わった後に、毎日推しの声を聞いて癒やされていた。忙しいながらも平穏な日々を送っていたきみこだが、ある日自宅のアパートが火事で燃えてしまい、急遽実家に帰ることとなる。実家でも“たっつー”の配信を聞いていたきみこだが、なぜか隣の家から推しと同じ声が聞こえてきて……！？ ちょっとエッチな再会から始まる、ハイテンションなラブストーリー！