Hirahara Tsukasa just moved to Tokyo from Hiroshima, and she's late on her first day of school because she misses the bus. But this leads to a chance encounter with four other people in her class, and somehow, the five of them became friends?
Crybaby Tsukasa, the sharp-tongued yet soft-hearted Himeno, the understanding Ichihara, as well as Agatsuma and Onda… these five different personalities come together to create a youthful school life story—
(Source: Day of the River)

From Evil Flowers:

Inoue Azusa's classmate, Saito, is extremely good looking, but he has the worst personality ever. For some reason, he started noticing Azusa and gets her in a lot of trouble. Although he's very annoying, Azusa gradually becomes attracted to him. However, Azusa's classmate, Hikaru, is not only handsome and is the president, but towards Azusa he is...?!

Sakura confesses to Hatano-kun one summer and is rejected instantly. She does not have time to fall into depression as she has to return to her house to meet her new "younger brother." What she never expected was her "little brother" ended up being taller than her…

(Source: Lemonade Scans)

Makoto is suddenly confessed to by her narcissistic childhood friend Kikuchi Reita. Not even just any confession, he stands in the street and publicly says “If you want a boyfriend that badly, I don't mind going out with you”. Which was obviously a no, since Makoto has never considered Reita to be a man, especially a man of interest. What will become of her daily life now that Reita insists on her going out with him?

(Source: MU)