Main girl falls for him completely organically. No dumb "we knew each other when we were 5" or "I saw him water the plants" or "Saved her from the grapist"; he uses his nerdy model painting skills to do her nails, transitions them to makeup, uses his figurine hair and fashion skills,I think what makes this better then other otaku x gal romances is the fact that this otaku-kun isn't a doormat and doesn't really follow any of the stereotypes as well. He isn't introverted, the dude works out and is very much a people person and not really insecure about himself. He's genuinely just a great guy and it feels a lot more real that not just one but 3 girls fell hard for him after getting to know him.