Collection of short stories:

37℃ Kissu
Naoki was a very cool and good looking guy, but somehow after meeting Fumika-chan, he's not cool at all, but very cute?!

Himitsu no Namida (Secret Tears)
He saved his second button for her, but on their last day, she handed him a love letter to give to his best friend. Instead of delivering that letter, he kept it himself, and asked her to go out with him instead...?

Caramel Kiss
Atsushi-sensei is Kawahara's first love, will he be able to accept her affections?

Shounen Knife
Until Riki moved in, the house next door to Mimi's was always vacant. Riki saved Mimi's cat, but it seems that he isn't as well mannered as she first thought?

Kiss, Zekkou, Kiss (Bokura no Baai Extra)