Inseparable Bros

Se-ha is intelligent but can't move his body down from the neck. Dong-gu is tall and athletic but has a mental age of 5. Two have lived in a facility and have been inseparable for 20 years. After Father Park, who ran the facility, suddenly dies, Se-ha tries to figure out every possible way to keep the facility open and living with Dong-gu. When Se-ha finds out Dong-gu is talented in swimming, he asks Mi-yeon, the part-timer who worked at a swimming pool, to coach Dong-gu for the swimming competition. Dong-gu finally makes it to the game, and he, as an athlete with an intellectual disability, gets a lot of attention. However, that also attracts attention from a person who might make them separated for good.