At the sales office of an automotive company in Tokyo, Yukio Ogawa, a 27-year-old mechanic, is a "parasite single" who still lives with his parents. His mother does everything for him, even his lunch box daily. The reason is his workplace is within walking distance of his home. His life changes when he applies for a green card and finds out he is the most popular among the three women in his colleagues. He is perplexed by the approaches of Tomoko Aoki and Erika Yamamoto, who have had a one-sided love for Yukio for six years. Still, Yukio's monochrome life of shuttling back and forth between work and home begins to take on color.

Katsuhiko Anzai, one of Yukio's five classmates, has broken up with his college girlfriend because of his sexual orientation. Yukio's older brother, Toru, was his first love, but six years after joining the company, he became a bridge between the other classmates and Yukio's close friendship. At the same time, he was always concerned about the disappearance of Kenta, his junior in college, who resembled Toru. ......!

A contemporary romance and BL story are interwoven by six classmates.

This story is also available in Japanese and bilingual versions, English and Japanese.