Anime Crossover: I Became a Simulator for Girls

After transmigrating to a crossover anime world, Chen Fang originally wanted to live a peaceful and stable life.
Who would have thought that after entering high school, one unusual thing after another would happen, and one after another, the beautiful girls that Chen Fang knew from his previous life would appear in front of him, but their identities had all undergone earth-shattering changes.
Chen Fang's Awakening Life Simulator, but this simulator seems a bit off. Why can it only be used by other people?
[Simulating Rin Tohsaka, she goes on a rampage in the Holy Grail War, her demonic muscles tearing through the Matou family with a single punch, and being designated as a sealer by the Clock Tower...]
[Simulating Hinata, awakening the Tenseigan in the ninja world, her Gentle Fist technique directly dominated half of the ninja world; Madara Uchiha called her the strongest...]
【simulation......】
In each simulation, Chen Fang gains some of their abilities, thus embarking on a unique path to becoming stronger.
But can someone tell me why they all cling to me?