Okosama Brat

From Viz:

Miku Yamada has a longtime crush on classmate Kyohei Fujioka. But no matter how many times she tries to show him how she feels, clueless Kyohei just doesn't get it. Frustrated, Miku gives up on him, only to have him start calling her "Cactus" for being prickly when he's around. Will Kyohei ever figure out Cactus's secret?

- Includes other stories:

Okosama Brat
Taishi stays at Rie's house because his parents work overtime. Rie thought that he was actually her real brother! Now, Taishi says that she's "idiotic now and then". People think of Taishi as cool and mature, but Rie knows that he's just a brat inside...

Sono Saki no Sweet
Hidaka Mao was confessed to by her crush Chihiro-kun in junior high, but as soon as they started going out, she became unable to communicate with him. She is still confused about her feelings, but will this year's Valentine's day bring them together again!?