Tenjou no Shita ni Koi

"I left my parents who work overseas and came back to Japan to start my high school life. Then, they asked me to live with their boss' sons. There are four of them. The youngest only 3 years old, the second and third son are my seniors at school, and the oldest is a social worker. They are on good terms with each other. But, the more I know them, I feel there's something different with my feelings …"