Advice for the translator, when you're translating a doujin that uses characters from a pre existing series, you should check how their names were translated in that series.
Every one of the four female characters have their names be based on seasons, with Gyeul literally translating to Winter, but it shouldn't be translated. Just like how in mangas you don't translate character names, they don't call Aoi Ashito "Blue Ashito".
Also translating names usually smells of MTL. Not saying this one is MTL, but that's what MTLs do