(Protean Sound4) [Yu Ringo (Goichi Ichigo)] TouAki no Seiheki o Matome Yatsu (Project Sekai)

Blowjob (フェラチオ, fellatio) is one of the most common sexual act tags in doujinshi. It covers oral sex performed on male characters. The artistic depiction varies from realistic to stylized, with many artists developing signature techniques for depicting the act. Common visual elements include drool, tongue detail, eye contact, and depth indicators. The tag appears across virtually all genres and is frequently paired with tags like 'ahegao,' 'big breasts,' and 'sole female.'

Yaoi (やおい) refers to male-male romantic or sexual content created primarily for a female audience. In doujinshi, yaoi works feature relationships between male characters and span a wide range from soft romance to explicit content. The genre has its own rich ecosystem of tropes, character dynamics, and artistic conventions. Yaoi is distinct from 'bara,' which is male-male content created by and for gay men. Common related tags include 'males only,' 'seme,' 'uke,' and 'anal.'

Males only indicates that a gallery features exclusively male characters. This tag is primarily found in yaoi (male-male) content but can also appear in solo male content. It helps readers filter for content without female characters. The tag is commonly paired with 'yaoi,' 'anal,' and various male character tags.