Re-encounter, top pursues, status gap/celebrity top
Chapters 1-62 are one story (the one from the cover picture and name), and 63-82 are two entirely different people, who are briefly shown as in the same universe in a tiny portion of an episode. Even a very different art style. Confused why this short story is tacked on the end instead of its own thing, they're not related and different paces completely.
Licensed in English but the site (WeComics) no longer exists, and couldn't find the official translation anywhere. These are fan translations.
I Fell in Love with My Sister's Boyfriend