(1-3): Research grad and his underclassman caretaker. Easily targeted by assaulters. Coerced into sexual relationship with a teacher to protect underclassman.
(4): University student escorts a foreign prince for a day. They fuck and fall in love.
(5): Masochist actor looking for a sadist partner finds one in his manager
(5.5) Train molestation of the three couples
(6-7): More of first couple; research grad assaulted by high schooler
(8): student and prince couple
(9-10): Masochist and sadist
(8): Prince and student couple
Toshishita Kareshi no Renai Kanriheki