From JShoujo Scans:

1. Natsuiro Memorial (A Summer-Colored Memorial)
First love is a sweet poison. A painful, but unforgettable love. Two years have passed since the graduation day and they meet again during a high school reunion. His appearance has changed, but...?

2. Kimi to Watashi no Kakaomoi (Our One-Sided Love)

3. Suki yori mo Kirai (Hate Over Love)

4. Yuki ni Negai (w)o (Wish Upon the Snow)

4.5. Akiiro Memorial (A Fall-Colored Memorial)
Extra chapter of Natsuiro Memorial