Hana ni Arashi

Amidst a turbulent Showa era rife with student protests, a man named Kamiya struggles in solitude with his troubles, unrelated to the strife around him. He harbors a secret: an illicit affection for his friend and classmate, Houjou. One day, whilst imagining Houjou and losing himself in the act of self-pleasure, he is caught by the object of his affection…!

(Source: Core Magazine, translated)

Note: Includes one extra chapter.