1-2,7.5 : My whole world revolves around you - an inferior little brothers catches the eye of a cool guy who finds him cute
3: Beautiful and Stupid - a handsome guy who can casually kiss his friend, but feels inferior when he was slapped.
4: False Barber - someone with crazy bed hair has a dependable barber friend who has a possessive tendency to hate anyone else touching this guy's crazy bed hair. In the end, they became each's exclusive barber/customer.
5-6: Cheap Soul, Bright Future - false rumors led to a 100 yen sex transaction which the rumored gay didn't clear up. 10 years later, they still go through it, except now, they consider the word "love".
7: Sweet confectionary - popular guys and the blond's addiction for the sweets. A simple "I hate you" leads to a dramatic request to be treated gently and sweetly by this non-sweet loving popular guy (they look like the characters in Beautiful and Stupid, but they have different names.)
Sekai wa Kimi de Mawatteru