Short-Tempered Melancholic (manga)

Short-Tempered Melancholic
Kajika Yamano is a female ninja whose job is to protect her family's legendary weapon. But when a boy she has a crush on tells her she should be more ladylike, she vows to give up all ninja related deeds.

This Love is Nonfiction
Yuri sends her pen pal Ryo a picture of herself--but it's really of her best friend Karin, who is prettier than she is. Now Ryo wants to meet her, so she has no choice but to send Karin instead!

Romance in the Afternoon Rain
Minori falls in love with Takato, a boy who shared his umbrella with her one rainy afternoon. Now she "forgets" her umbrella every time it rains in hopes of becoming closer to him.

Second Time in Love
Mana secretly likes her friend's boyfriend, but Nakamura, a younger boy, is determined to win Mana's heart.