Masaki is an 11 year old boy who enjoys having fun and being with his friends. He is very adventurous and loves the outdoors. He can be clever, as he assumes Hana-chan acts "mysterious" when she is around him and usually guiding the other boys around as a leader. The other boys in the class are very jealous of him because of how girls act towards him and how he is smarter than the rest. Even though he only thinks of him and Hana as "just friends", he blushes when someone teases him about them or when Hana is trying to make a move on him and he notices it.