Dekisokonai to Yobareta Motoeiyuu wa Jikka kara Tsuihou sareta node Sukikatte ni Ikiru Koto ni Shita  

The Banished Former Hero Lives as He Pleases, 出来損ないと呼ばれた元英雄は、実家から追放されたので好き勝手に生きることにした, Dekisokonai to Yobareta Moto Eiyuu wa, Jikka kara Tsuihou Sareta node Suki Katte ni Ikiru Koto ni Shita, できそこ, DekiSoko

Allen was considered worthless due to his low abilities and lack of natural talent. As a result, he lost his noble status and was exiled from Westfeldt. Despite this, Allen had a secret - he was once a great hero in another life. He was excited about the opportunity to finally live life on his own terms. However, his peaceful existence was disrupted when he encountered his ex-fiancée in need. As a former hero with incredible powers, Allen couldn't ignore someone in need, even if he didn't want to. This marked the beginning of Allen's new heroic journey that he never sought.