He does not want a girlfriend, but he still wants loving sex and romantic dates without being tied down. Kotone is the convenient answer: whenever they have time, they check on each other, meet up, and have bareback sex with creampies. They have never agreed to date, and he still fucks other women, yet he likes Kotone enough that he does not want her seeing anyone else. Every reunion turns into affectionate unprotected sex. Is she a casual sex partner, or practically his girlfriend?