My \"Pure Love\" System is a Harem Trap

Rinno Natsume, a high schooler who despises \"youth\" and romance, just wants to get rich writing webnovels. But his past haunts him: a \"bad woman\"—Yukinoshita Haruno—drove him from his home three years ago. Now he's back, financially independent, and ready for revenge. Just as he was getting back on his feet, a ridiculous \"Pure Love System\" loaded, promising immense power and rewards for forming \"pure relationships.\" Rinno, an anti-romance otaku, is disgusted, but sees an opportunity. His first system quest? \"Conquer your demon sister, Yukinoshita Haruno, through a pure love relationship.\" Can Rinno endure the humiliation of dating the very woman he despises, or will this \"pure love\" system push him too far?