Rin-san, a 32-year-old who works at a library, is deeply in love with her boyfriend (fuck buddy) and does whatever he says—she's what you'd call a convenient woman. Recently she hadn't heard from him and was feeling lonely, but then she got a message from him saying he wanted to meet up. Of course, they don't go on proper dates; he just buys her a cheap meal and then they have sex at home. It's heartbreaking to see Rin-chan being so obedient without a single complaint even when treated like this. But honestly, a plain, big-breasted, gentle woman in her early 30s like Rin-san is just perfect as a fuck buddy.