Ninzuu Awase de Goukon ni Sanka Shita Ore wa, Naze ka Amari Mono ni Natteta Moto Ninki Idol de Kokuhou-kyuu no Bishoujo wo Omotchikaeri Shimashita.
人数合わせで合コンに参加した俺は、なぜか余り物になってた元人気アイドルで国宝級の美少女をお持ち帰りしました。
Makishima Yutaro is unexpectedly added to a mixer by Asaki Seiichi, a well-known member of the soccer club, due to a shortage of participants. At the event, Yutaro is assigned to the only woman left without a partner, who is later revealed to be Kiraboshi Ayane, the former leader of a highly successful idol group. Yutaro's life changes significantly after he begins spending time with Ayane, a former idol known for her striking appearance and often described as a "national treasure."