A jobless man living in an internet cafe unexpectedly reunites with his former best friend and is allowed to stay at his place. The two are close as ever, the kind of inseparable buddies known as "mabudachi." His friend is now married and lives in an apartment with his beautiful wife. One night, unable to sleep, the man steps out of his room and feels drawn toward the bedroom where the wife lies sleeping—until he can no longer restrain himself...!