Yi chan has a best friend named ma joo. He will start a band for a girl. He will meet Eun gyeol thinking he is dongjin. He will deaf later in the story. 

Yi chan is a playful student who is in high school

Eun gyeol travels through la vida music shop. Yi Chan, who is eighteen (everybody is eighteen) and who is going to grow up to be Eun Gyeol’s father. Besides working at the ice cream shop, he is starting a rock band with his friends. Yi chan has a best friend named ma joo. He will start a band for a girl. He will meet Eun gyeol who also is his future son who time travel in 1995. Yi chan will get deaf later in the story. 