Cha Seojin has always liked his next-door neighbor, Han Ikyeong, ever since they were born. As his feelings grew, Seojin confessed to Ikyeong but was rejected, told that Ikyeong only saw him as a younger brother. They lost contact after high school graduation.

Then one day, while Seojin is out enjoying the cherry blossoms, Ikyeong appears with his son, Gyeoul. Despite the time they spent apart, the two quickly grow close again...

"Hyung, you should quiet down. What if Gyeoul wakes up?"