Rina Saijō (西城 梨奈 Saijō Rina) is a charismatic girl from a wealthy family who transferred to Haruka Shinozaki's school in search of a boyfriend. Like Akiho Kōsaka, Rina is very liberal in talking about sex-related matters, but since she previously attended an all-girl school and could only find romance with other girls, her experience in romancing males is practically non-existent.
- Rina owns two dogs named Butter and Margarine, whom she regards like human beings.
- Her three sizes are B92(G cup) W61 H90.
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