Manga by author Suzaka Shina - Status ongoing

Kirishima Naoto is handsome, hardworking, and popular with his female coworkers, except for the extreme brother complex he has for his younger brother, Hokuto. Swearing off love for his brother's sake, Naoto only really hangs out with his friend from college, Toudou. Though he knows Toudou is gay, he has never held it against him. One day, he sees Toudou texting his brother Hokuto and declares that he will change places with his little brother since "any man would do" for Toudou!

A series of one-shots based on the Diabolik Lovers otomegame.

After three years of dating, brocon Naoto and Toudou, who is gay and has been Naoto's best friend since college, continue to grow their love. As the world around them gradually changes, with Naoto's younger brother, Hokuto, leaving home to go to college and his mother meeting someone new, Naoto begins to seriously consider living with Toudou...!? The grand finale of Toudou and Kirishima's love story!