Not a Chapter!
Some Main Characters:
Mina: 16 
Relationship: Single (For Now)

Sana: 16 1/2
Relationship: Taken (BamBam)

Momo: 17
Relationship: Taken (Jackson)

Yugyeom: 16 1/2
Relationship: Single

BamBam: 17
Relationship: Taken (Sana)

Jackson: 17 1/2
Relationship: Taken (Momo)