Inkya Datta Ore no Seishun Revenge - Tenshi sugiru Ano Ko wa Ayumu Re Life

After his previous job took its toll on his body and spirit, Shinichirou Niihama wakes up in his high school sophomore year, determined to start anew despite his dark past. During his return, he encounters Haruka Shijouin, a charming girl he met previously, who appears even more innocent and alluring than before, with her gaze now firmly fixed on him. Haruka notices Shinichirou's newfound maturity and kindness, and she remarks on the change she perceives in him. Given the opportunity to rewrite his history, he would certainly prevent her from becoming a victim of severe bullying that led to her untimely demise. Equipped with business acumen and a more mature perspective, he plans to avenge himself by reliving his youth with her.