NEET Receives a Dating Sim Game Leveling System

Alternate World, Appearance Changes, Beautiful Female Lead, Brother Complex, Calm Protagonist, Caring Protagonist, Character Growth, Cheats, Cohabitation, Demons, Fat to Fit, Galge, Game Elements, Ghosts, Handsome Male Lead, Hard-Working Protagonist, Hidden Abilities, Hiding True Identity, Honest Protagonist, Indecisive Protagonist, Level System, Loli, Love Interest Falls in Love First, Male Protagonist, Mature Protagonist, Modern Day, Monsters, Multiple POV, Mysterious Family Background, Mysterious Past, Mystery Solving, Otaku, Past Plays a Big Role, Personality Changes, Polygamy, Reincarnated in Another World, Reincarnation, Secret Organizations, Shoujo-Ai Subplot, Siblings Not Related by Blood, Sister Complex, Special Abilities, Spirit Users, Spirits, System Administrator, Time Manipulation, Transmigration, Trap, Weak to Strong, Younger Sisters