Dearest Blue 1 - Busty idol schoolgirl is chained and fucked by pervy hentai old man

Ootori Rio is a rich girl and the student council president and her male friend is Mamoru. Yoshikawa Noa is Rio's senior coworker in the idol talent agency. Rio participants in a beauty contest and gets ensnared in a game where Rio is the "sacrifice" to be won by rich and powerful contestants who vie to take her virginity. Mamoru gets a nice handjob from Rio but she says she can't have sex with him because she is a student and idol. Rio's dad apparently got entangled with bad people. Rio wakes up to find out she's been chained up and about to be fucked by the dirty old man. Mamoru walks in on the troubling scene. Will he stop the old man from fucking his girlfriend?