Cool! Nice Seinfeld joke there! That also seems to indicate that the characters are adults, am I right?
They're around 17 ~ 18 years old. TBH (And I'm not being humble), it's just a silly novel with a rushed story (nothing special, since it's my first VN)
No way, it looks great for a first one! Haven't played much of the genre, that's why I was curious about the ages. Anyway, good luck!
