The poster really says it all.
In Yes or No (Yes or No อยากรัก ก็รักเลย, Yes or No, Yak Rak Kor Rak Loei) a college girl named Pie (Sucharat Manaying) has a tomboy named Kim (Supanat Jittaleela) as a roommate
They have their differences at first. The girl thinks the tomboy with the Korean pop-star hair is a guy. They divide their room in half with a line that shall not be crossed.
But they eventually become friends.
And perhaps it will be more than friendship?
There's a trailer and you can watch it here.