He intentionally triggered the landmine girl and the results are as expected. She blew up and blew it all spectacularly, but not including him since he's better prepared and knew what to say. With this he has proven the message window can be trusted. At least when it comes to Yuu, his imminent ex-gf.
Begone, thot. Cheaters like you belong to the streets. It's clear she never actually loved him, so this is for the best. Until she tricks another sucker to fill in the trophy bf role, she'll be forced to endure the gasp disgrace of being single, and the resulting scorn of any like-minded peers.
If only Saki Tanaka (the waitress) didn't fumble it by not giving him her number, she'd be in position to swoop in and take him for herself. Then again, it only seemed like she was attracted to the gap moe of his inexperience and good looks, and will probably leave after snacking on him in a one-night stand or two for the next cute virgin guy she sees.
IIRC Akari Mizusawa (the neighbor) has been eyeing him longer than the others, she's probably a better choice. Haruka Oono (tomboy college friend) sounds like a decent choice too. They're not all nutcases, right?