Last Summer - Introduction

Two Guys suddenly meeting at a complicated time. Both of them tried to be the best of friends. Both of them succeeded. They lived together without wanting to break each others happiness. Yes, they we're once lonely. Both of them felt the loneliness in such a young age. It all disappeared when they met each other. But they became happy when they met Rin, the girl that brought happiness to their lives. The girl that gave them the feeling called "LOVE."

Who would Rin choose if she discovers that both of them have feelings for her? What would Mark do if he finds out the guy that hurt Rin's feelings? Would Akiee lie about his feelings for Mark's sake? What would happen to Brother-like relationship Mark and Akiee have?
What would they do, if they find out, that this will be their last summer?