Se-ha who is physically handicapped and Dong-gu who is mentally handicapped are not their own brothers. But while living 20 years together, the two became indispensable to each other. One day, the mother of Dong-gu suddenly visits him and acts as his guardian.
Park Sin-bu

Kil Hae-yeon
Jeong-sun

Kim Kyung-nam
Teacher Yook

Ahn Ji-ho
Young Se-ha