Romeo x Romeo
Ch. 1-3: Student council president Masaoka seduces the rival school's student council president, innocent Maisaka, to influence their schools' annual competition to win the statue "Juliet" Ch. 4, Pg. 4-43: Student council VP Touya's promiscuity gets discovered when he's visited by his young master, CHF, and crush Yoshishige, of the rival school Ch. 4, Pg. 46-85: Sanada and Shikura, now teachers at rival schools, were tennis doubles in school but stopped playing together after a misunderstanding
Aisaresugi Confusion
Ch.1: As a child, crybaby Eita fell for his CHF Yuuki, who comforted him. Now in college, a misunderstanding causes Eita to believe Yuuki is in love with their mutual CHF Kousuke Ch.2-3: Germaphobe Kousuke has attracted the attention of his messy classmate Moutou. Despite Kousuke ignoring his confessions as a joke, Moutou's clinging only continues to escalate Ch.4: Hiiragi has been troubled by his dorm neighbor Sakikawa's obsession with touching his legs, until Sakikawa starts avoiding him
Boku wa Kimi no Iinari