in the next chapter, the sunbae is actually going to ask hayoung to be his pretend girlfriend because apparently, the person who saw them was actually a girl who liked sunbae, and turned out to be a stalker. so, he's asking for hayoung's help to get away from the stalker and help hayoung too, because she would be targeted by the stalker??? i'm not sure about being targeted or what but yeah, sunbae asked her to be his fake girlfriend to stop the stalker. also, sunbae will explain who was his first love (and yup, it was the girl he was with at the bus stop, they were childhood friends??)