Demon Slayer: Kimetsu No Yaiba: Qingyang Yaoling, Hefeng Rong And

A lonely young man was adopted by a teahouse owner and worked in his shop. However, when he thought his happy life would last, a ghost broke his hope, and his hope turned into despair. Unable to accept all this, he struggled to resist the ghost's attack, but he was no match for the ghost because of his powerlessness. At this time, he met [Flame Pillar] Purgatory Anjuro, Anjuro saved him, and the young man successfully became his little follower. Ps: The introduction is weak, if you are interested, please explain in the main text.