The only romance I could possibly see here in Felli,Leerin and that one shy girl, there is an age difference between Layfon and Nina I know Felli is older than Layfon as well but she's not that far from his age. Felli is ok cause of her loliness
I would seriously love to know what other anime males that are 15 years old that made a successful relationship with an 18 year old female.