[Ra-men] Titi to Doctor to Umeya Fuyaseya | Be Fruitful and Multiply, Doctor and Titi (Arknights) [English]

Sole female indicates that a gallery features exactly one female character throughout the entire work. This tag is important for readers who prefer focused, intimate scenarios rather than group dynamics or harems. It doesn't imply anything about the number of male partners — a sole female gallery can feature one male partner (sole male) or multiple. The tag helps distinguish between different relationship dynamics and is commonly paired with tags like 'sole male' for one-on-one scenarios or 'multiple male' for gangbang-type content. In terms of narrative structure, sole female works often develop a single relationship or encounter in depth rather than juggling multiple characters.

Dark skin (黒人, kokujin / 日焼け, hiyake) refers to characters with darker skin tones. This includes naturally dark-skinned characters, tanned characters (tanlines), and characters with dark skin as an artistic choice. The tag covers various ethnicities and skin tones. It's often paired with tags like 'tanlines,' 'big breasts,' and 'big ass.'

Defloration (処女喪失) refers to content involving the loss of virginity. In doujinshi, this often serves as a narrative milestone and is depicted with varying degrees of realism. The tag covers both first-time experiences and the physical aspects of virginity loss. It frequently appears alongside tags like 'sole female,' 'nakadashi,' and various romance or school-themed tags.