How I Attended an All-Guy's Mixer(2020)

Goukon ni Ittara Onna ga Inakatta Hanashi

College student Tokiwa gets invited to a mixer by his female classmate Suo. But when he arrives with his friends, they're greeted by three dazzlingly handsome men?! But as the two groups get to know each other, they find themselves getting closer in unexpected ways.

(Source: MANGA UP!)

Note: The manga was licensed by Square Enix on 2021 and started being published on their Gangan ONLINE service.