Himitsu.

1. A Passing Story A school doctor recounts a romance from her own school days. 2. Pink A love triangle. It's set in the same school as "A Passing Story." 3. Romance A couple from the same school as "A Passing Story" and "Pink." 4. Lover Continues "A Passing Story" story in the present. 5. Himitsu. (Secret Love) A girl deals with heartbreak. 6. Toiki (Sigh) Shiratori, now in college, despairs of ever finding love. (Source: Lililicious)