Hatsukoi Limited

From Mangahelpers: Being an adolescent girl is just one problem after another. Middle-schooler Arihara Ayumi receives a note from a high-schooler, a very large and intimidating boy, Zaitsu Misao, asking her out. Frightened and intrigued, she doesn't know what to do! From Baka-Updates: A series of related stories about (a lot of) middle and high school students as they discover their hatsukoi (first love).