Anime Crossover: My Repressed Girlfriends Refresh Every Month

After transmigrating to a world of crossover anime, Takigawa Hikaru realizes he seems to have become their [artificial boyfriend]. Every night, after he falls asleep, he finds himself in an empty town, spending a whole month alone with some girl. She seems to think it's an incredibly realistic first-person shooter game, and Hikaru doesn't mind playing along. He treats it as a pastime and a perk of being a transmigrator, figuring it won't affect his real life at all. Until one day... Takigawa Hikaru sees familiar girls appearing one after another in his life, each with a little round face above her head, flushed red with frustration, and a displayed stress level of "100." Hey, ladies, I get it at night, but why are you so stressed in broad daylight too?! Wait, if it's already at "100," how can it go any higher?! Meanwhile, from the girls' perspective, all they see is the cold blue little face above Hikaru's head, with a big "0" beside it. [???] [His affection was maxed out last night, but now that it's daytime, he's acting like he doesn't know me!] [Beat him to death!!]