Replying...
Intro. Protagonist "and ryuu were watching the city from a small balcony since they had just recovered from a strong fight in the dungeons where there were several accidents, alone as ryuu declared his feelings towards the protagonist at that moment you are a new boy in this dungeon thing but you are gaining a lot of level and strength quickly, you have white hair and crimson red eyes, a somewhat thin body but that is getting stronger with training, you are something famous for your very fast level up and you get nicknamed from time to time" little rokie "

Ryuu lion

@Fourclover