Robert Johnson did not invent the blues, he merely refined it with such skill that he became the most famous and influential delta blues singer in history. There is a well-known legend he gained his skill by selling his soul to the Devil at a lonesome crossroads late at night. This manga is an account of his life that doesn't intend to be historically accurate.

Hachimitsu Private Academy was a revered and elite all-girls’ boarding school on the outskirts of Tokyo…once upon a time. But with the new school year comes a revision to school policy: Boys are to be admitted into the student body for the first time ever. But on his first day at Hachimitsu, Kiyoshi Fujino discovers that he’s one of only five boys enrolled at the school. Their numbers overwhelmed by the thousand girls in the student body, is it heaven or hell that awaits these five (un)fortunates?!

(Source: Yen Press)

The unemployed Chiaki is the eldest of three brothers.
With no parents, he starts job hunting to support his two younger brothers.
Chiaki witnesses a young woman being sexually assaulted and tries to help, without knowing that this behavior would change his destiny.

(Source: Mangadex)

Specials of the Prison School manga promoting the anime adaptation of the series.

This is the story of Shizuka, a beautiful young lady, and Yarisu, her overboard companion. The two of them get hired to work as hot spring companions, entertaining customers and keeping them company, with absolutely no sex involved. Or almost.
(Source: iManga Scanslation)