Review Detail of Sword_1mmortal in Harem Protagonist's Sidekick

This is a nice change of pace. Not to mention I've been craving for a novel like this. One where the mc just does his own thing and unknowingly steals or makes heroines from the harem protagonist's harem fall for him. I read a few with similar plot but they were always in a fantasy or supernatural setting. Seeing it in just a normal and non fantasy setting is good. Good old Slice-of-life, romance, and school life elements.