Hagure Yuusha no Aesthetica  

Aesthetica of a Rogue Hero, Hagure Yuusha no Estetica, Естетика героя-вигнанця, Потерявшийся герой забрал девицу домой, はぐれ勇者の鬼畜美学[エステティカ], はぐれ勇者の鬼畜美学〈エステティカ〉, ชีวิตอันแสนรื่นรมย์ของผู้กล้านอกระบบ

In the world of Hagure Yuusha no Aesthetica, thirty years before its start, individuals from Earth were summoned to different realms. Approximately half of them returned home. Among those selected was Akatsuki Ousawa, who journeyed to Alayzard to vanquish Dark Lord Garius and subsequently returned to his world. Some successful returnees brought back trinkets as keepsakes. In contrast, Akatsuki chose a unique path-he brought back the defeated Dark Lord's daughter, Miu, whom he now poses as his long-lost little sister! Upon their arrival, Akatsuki and Miu were compelled to enroll in BABEL, a specialized institution where they must hone their newly acquired abilities with the goal of eventually serving humanity. The question arises: can Akatsuki and Miu maintain her true identity concealed or will their plan for a tranquil existence together be jeopardized?