He is 18 and she is 22 in the first chapters
Oh! Mb
Wait I'm just now counting.. THATS STILL 4 YEARS OLDER SHES TOO GROWN FOR ALLAT
The only reason I don't find it as appalling is that they didn't just see each other and fall in love or that one chased the other. They just realized that they were very comfortable with each other and found out those feelings weren't friendship but romantic. It also helps that they were are similar phases of their life when they met. He was full time working and even was being raised to be promoted higher while Risa was also fulltime working and lived independently.
Theres allat this I find concerning like the age gap of mc and ml isn't the dude 16 and she's like 4 years older