Ryunosuke becomes a new high school teacher. The mentor assigned to him turns out to be none other than his first love, his "big brother" Suzuki...! But Suzuki, whom he reunites with after 15 years, has grown into a womanizing, no-good adult...!? "You still like me, don't you?" — A laid-back older art teacher × a devoted rookie teacher in an after-school staff room BL!