Kasumi Namori's Life with A Teacher!

"Remember, you'll be living with men." Kasumi is faced with a forced school transfer. Her homeroom teacher Mr. Sera tells her, "If you really want to stay, then come live with me." But doesn't that mean just Kasumi and him!? Her head spinning at the thought, she arrives at Mr. Sera's house... only to find it filled with wild teenage boys!!