Manga by author Watanabe Ayu

A story about a first-year high schooler named Mio. Her younger twin brother Yuta, on the other hand, is a social butterfly who makes people around him laugh easily. Although she always yearned for a perfect, sparkling Life, she felt that it wasn't in her affinity. However, one day, she met a senior one year older, Rin by chance and started working together?!

From Which Scanlations: Shuusei Kugayama is the "prince" of his high school, but he always turns down confessions--including one from Aoi Nishimori's best friend. Although she initially hates him for this, when Shuusei moves in next door to Aoi, who lives alone, she starts thinking that he might not be such a bad guy after all...