Because You're Shy at Night

Sonoyama is a hard-working salaryman that had forgotten how to enjoy life since his parents died and he had to take care of his two little brothers. One morning, he unexpectedly woke up in his Boss’s bed. Terrified of being fired, Sonoyama dashed out from the house. But why can the insomniac Sonoyama can sleep so well beside the conceited and kinda-sadistic Boss?