Rayleigh1121

The protagonist starts on a random island and has to upgrade it, kind of like a tycoon game. He has a system that lets him develop his island, train, and improve everything over time. He watches the events of the manga from an outsider's perspective while building up his own power. Mostly smut, but with crossover characters from other anime. The MC does have a system in this one.

My Harem System In My Hero Academia

Anime & Comics · GhostGirlFucker68