From Bliss:
To fulfill their life long dream, Ezakike Shuu's parents left for Africa, leaving him in charge of his younger brothers. However, growing up without parents' guidance, the Ezakike brothers are often ill-treated and looked down upon. In order to protect his brothers, Shuu devotes his life to raise them filled with happy memories. However, a fated meeting with his new homeroom teacher would turn his life upside down...