Idk how he can think about stuff when he's mid penetration & a horny teenager but I'm just overthinking things. The fact that they showed 5 other guys wanting to hook up with Agawa made me wonder if there are more than 5 other suitors in her contact list. Also Inukai is already hooking up with 2 other girls so is he trying to make a record on how many different girls he can bang in a day? Thanks for the chapter.
I wouldn't know, myself, but I imagine being in a complicated situation like that at his age would bring a lot of things to his mind. I'm honestly impressed he still managed to maintain an erection and plow her, because stress can really dampen your sex drive. It's one of the bigger enemies of ED, really. Though, competition could have its ways of increasing one's testosterone levels, and as we've seen in a previous chapter, MC works part-time in a game center that involves a bit of physical labor, which can up those levels even further.
Honestly, for trying to scare MC by pretending to walk out on him like that-and we really can't say for certain whether she was pretending at all-to manipulate him into giving her the sex she wants, I think this is one of those rare moments she deserves a bitch slap, or at the very least don't treat her 'gently'. He may be doing what she wants that way, but at the very least, he could vent some frustration on her for playing him like that.