If you're looking for manga similar to Ranking of Kings: Treasure Chest of Courage, you might like these titles.
There are many firsts when you are a child. The first time your heart pounds fast when you see your childhood friend, when it didn't do so before. The first changes in your body. Friendships and relationships that all too sudden become more complicated. The times when you don't want to talk to anyone, but it feels too hard to bear alone. This is the story of elementary school children.
When Chinatsu moves from Tokyo to a rural village, she quickly befriends the locals with her effervescent personality, optimism, and unusual singing voice. But not everyone is as happy as she is: the people that the bubbly elementary school girl meets all have their own personal problems, be it a messy family situation or a long-ago death that still looms heavy on their mind. Luckily, Chinatsu's singing isn't just pretty; it also has the unique ability to soothe a person's soul.
An apprentice blacksmith in a rural village who gets by using artificial limbs created by his adoptive father. But when a chance encounter with the demon Moki reveals Madara's true destiny, he's catapulted into a mythic quest! His real father, the evil despot Miroku, feared long ago that Madara was destined to kill him and rule in his place. After Madara was born with tremendous powers, his body was cut up, and the parts divided amongst eight evil generals. Now Madara, with the help of a band of freedom fighters and a magical sword, sets out to retrieve his body parts and defeat his brothers, who covet the throne.
Chao, a wheelchair-bound little boy, is excited to be finally going to school to make friends with people his own age! But when he gets to his homeroom, the weirdness begins. Reality is warped and the children slowly realize that their teacher is a monster in disguise. This monster teacher is capable of inflicting a horrible punishment on students that are unable to answer his question about punctuation. Will any of the students be able to discover the answer before it is too late?
When listening to a nostalgic voice in the crowd of people, Soo-Won looked back without thinking. However, it was not the girl of his memory...
At the Star Kids Home, a combination group home/orphanage, a disparate group of children struggle with both the everyday issues of growing up and those specific to abandoned or orphaned children. Their one avenue of escape is the Sunny, a junked car that sits a little ways from the home. In the Sunny they can travel the world, go into space, or just find a refuge from the troubles of their world.
A boy is born healthy, but without arms. As he grows, he wants to explore, to become a pilot, to experience life - but is constantly told that he can't by his mother. Then, one day...
A one-shot about a grade school class that tries its best to accept a girl with impaired hearing.
Higuchi Kotarou was just a normal sixth-grader until a new next-door neighbor enters his life–an insanely perky angel named Misha that has made it her life’s work to make Kotarou happy! And if that wasn’t enough, Misha has an even stranger roommate–a kind-hearted demon named Shia and her mysterious black cat Nya! If Kotarou’s life at home is this weird, what can it possibly be like at school?