As your mother adopted B1A4, the maknae, Gongchan, fell in love with you. But when he said a sentence to encourage you, your heart was moved and you too fell in love with him. 

Characters:

You(Kim Sung Ye)

-Has a quiet personality but in the inside, you have bubbly personality but only appears to those you are close with.

-Likes to eat ice cream

-Adopted by the Kim family with no children

-Has a horrible past

-Dream: To be more open

Gongchan

-Has bubbly personality and loves to do aegyo and smile.

-Like to eat grapes

-Has a crush on you after being adopted by the Kim family (together with B1A4)

-Has a horrible past

-Youngest of the family 

-Dream: Confess to you(Sung Ye)

Sehun

-Part of the group EXO

-Your classmate

-Has a crush on you

-Has a cute smile

-Your best friend in class

Seohyun

-Your bestfriend

-Knows your real name

-Has a crush with Sehun but she knows that Sehun's crush is you

-Cute

-Loves your personality

-Likes to act as your sister

Song Joong Ki "David"

-Your blood related brother

-Now Sehun's "brother"

-You had to call him David for no reason

-Depend on him 

-Pretend to hate you because your real parents hates you but he loves you a lot

-Does not know your new name