The Tatami Galaxy(2010)

Yojouhan Shinwa Taikei

When a college dropout stops for a late night bite at a mysterious ramen stand, he crosses paths with a self-proclaimed deity of matrimony. This bizarre meeting sends the young man hurtling through a horrifying flashback to his not-so-glorious college days when the influence of a cruel new friend turned him from a hopeless romantic into a mischievous “black cupid.”

(Source: Funimation)