NINE PUZZLE

Mika is a regular girl who just goes day to day without any concrete dreams for her future. Until one day, when she sees her classmate Kaede playing pool in a billiards lounge. Kaede is a boy who hides many secrets...whose personality seems to change when he plays billiards. Entranced by the smile Kaede wears when he plays, Mika soon finds herself immersed in the game...!

(Source: ShoujoMagic)

Also contains the following short stories:

Platinum in vol.1

Ichigo Namida (Strawberry Tears) in vol.2

Wakasama no Jijou (The Youth's Circumstance) in vol.2