There was someone Haruto didn't get along with. That person was Kokoro, a university student who worked at his favorite restaurant. Haruto had put up with it, thinking that their relationship was merely a lunchtime encounter, but then Kokoro joined Haruto's company! Then, for some reason, Kokoro seemed to take a liking to Haruto, and began to make aggressive advances to him. Haruto hadn't had a girlfriend for a long time, and had forgotten all about love, but...

(Source: Core Magazine, translated)

Note: Includes an extra chapter.