Seiryou Saikyou Monogatari

Volume 1: Chapters 1-2: Being the notorious school president of Seiryou Academy, Hashizume had control over every student and staff member. But when the transfer student Misonoi appears with his nonchalant and unassuming attitude, Hashizume sees his newest challenge in taming this new toy.
Chapters 3-4: A story about cousins who fall in love.
Chapter 5: Oneshot about professor/student relationship.
The Series Goes Like This:
Volume 1: Seiryou Saikyou Monogatari (Scandalous Seiryo University)
Volume 2: Seiryou Saikyou Monogatari Returns (Return To Scandalous Seiryo University)
Volume 3: Seiryou Saikyou Monogatari Limited (Beyond Scandalous Seiryo University)
Volume 4: Seiryou Saikyou Monogatari – Yano x Ishida Hen
– Serenade