This is a Series of Asian guys in homoerotic situation.
In China, Japan or even Korea same sex relations were not considered as illegal in certain communities as the monks, the militaries, the artists and a younger man was lover to a senior one who in return gave him protection and fidelity in an honorable affair.
Nanshoku relationships inside monasteries were typically pederastic, that is, an age-structured relationship where the younger partner is not considered adult. The older partner, or nenja (“lover” or “admirer”), would be a monk, priest or abbot, while the younger partner was assumed to be an acolyte (chigo, 稚児), who would be a prepubescent or adolescent boy.
From religious circles, same-sex love spread to the warrior (samurai) class, where it was customary for a boy in the wakashū age category to undergo training in the martial arts by apprenticing to a more experienced adult man. The man was permitted, if the boy agreed, to take the boy as his lover until he came of age; this relationship was expected to be exclusive, with both partners swearing to take no other (male) lovers. This practice, developed into the codified system of age-structured homosexuality known as shudō.
The older partner, in the role of nenja, would teach the wakashū martial skills, warrior etiquette, and the samurai code of honor ; thus a shudō relationship was considered to have a “mutually ennobling effect”.In addition, both parties were expected to be loyal unto death, and to assist the other both in feudal duties and in honor-driven obligations such as duels and vendettas. Although sex between the couple was expected to end when the boy came of age, the relationship would, ideally, develop into a life-long bond of friendship. At the same time, sexual activity with women was not barred (for either party), and once the boy came of age, both were free to seek other wakashū lovers.
Like later Edo same-sex practices, samurai shudō was strictly role-defined; the nenja was seen as the active, desiring, penetrative partner, while the younger, sexually receptive wakashū was considered to submit to the nenja’s attentions out of love, loyalty, and affection, rather than sexual desire. Among the samurai class, adult men were (by definition) not permitted to take the wakashū role; only preadult boys (or, later, lower-class men) were considered legitimate targets of homosexual desire. In some cases, shudō relationships arose between boys of similar ages, but the parties were still divided into nenja and wakashū roles
As Japanese society became pacified, the middle classes adopted many of the practices of the warrior class, in the case of shudō giving it a more mercantile interpretation. Male prostitutes (kagema), who were often passed off as apprentice kabuki actors and who catered to a mixed male and female clientele, did a healthy trade into the mid-19th century despite increasing restrictions.
Relations between merchants and boys hired as shop staff or housekeepers were common enough, at least in the popular imagination, to be the subject of erotic stories and popular jokes. Young kabuki actors often worked as prostitutes off-stage, and were celebrated in much the same way as modern media stars are today. Onnagata (female-role) and wakashū-gata (adolescent boy-role) actors in particular were the subject of much appreciation by both male and female patrons.