Wink Rain is the story that comes after Chocolate Christmas. It would count as being in Takeuchi-sensei's "Rain Collection". It has not been translated as of yet, so when I figure out the details they will be up here. Thank You.

Daisuki yo.
Yumemiru you na
natsu no gogo
ame no umi beya
itsushun no
mabataki no
kisu soshite
anata ga......
-- The Introduction to Wink Rain

All names Japanese name style:

Main Character: Aikawa Marin (Second one from the right)

Best Friend: Aya (First one from the right)

Crush?: Haji-kun (First one from the left)

Love Interest: Umino Koizumi (Koi-kun)