From Dazzling Scans:

A collection of interconnected oneshots:

• Wakaba
Wakaba is in love with her neighbour Shin, but one day he asks whether or not her perfect and beautiful older sister Saki is single...

• Saki
Saki is beautiful, smart, and popular with boys. However, she resents them for not noticing her personality rather than her looks. In particular, she hates her homeroom teacher for his flirtatious and immature ways. However, after getting to know her sensei, she discovers that perhaps she's guilty of not evaluating others' personalities as well.

• Aoi
Aoi and Hiroto have been classmates since middle school, but instead of being on good terms, they pick on and annoy each other. However, when Aoi is confessed to by another boy and is happily preparing for her first date ever... Hiroto starts to act differently.

• Cosmic Wonder ~ Girl and Lion

• Cosmic Wonder ~ Sweetest Goodbye