Baito-saki no Net Café ga, Nazeka Class no Bishoujo-tachi no Tamariba ni Natta Ken.

Synopsis

I attend the top college-preparatory high school in the prefecture. One day, I rescued a beautiful girl who had collapsed in front of the internet café where I work part-time. To my surprise, she turned out to be Mai Kurahashi, the cutest girl in the entire school. Who would've thought that this refined, well-born, busty, and slightly airheaded girl would end up falling for me?! And that's not all—the second and third cutest girls in school also start showing interest in me: a tall, sporty tsundere beauty, and a soft, easygoing gal with K-cup curves... A forbidden youthful romantic comedy unfolds within the private rooms of an internet café! (Source: Micro Magazine-sha, translated)