Actually the side and main story take the same character/ppl but with different universe, main story take historical and modern work&college universe while side story take modern highschool universe, well even u don't read the main story u can still understand the side story it had 1 main couple & 2 side couple (the massager the one with grey hair change his hair color, in the past his hair is black that why its kinda confused with 3rd couple). The main story itself kinda hard to follow, especially there is a scene of rap*ng by a ghost and many warning alert. for those who had anny issue with one of the warning im recommending just read the side story and its just shounen ai not yaoi with fluffy story rather than the main story ╮(￣▽￣)╭
This is confusing asf. I read the side stories first bc I wasn’t vibing with the summary of ghostly rapings in the main story. So imagine my surprise when I read the side stories about cute Highschool couples and thought I’d give the main a try to see it’s historical??? And they’re different ppl?? Then who tf are those boys in the side i tried reading the main story but could not follow along