GG-287 Big Sister's Real Sex Education Itagaki Azusa

Azusa lives with her father and younger brother, Ma-kun. One day, one of Ma-kun's friends visits with a notice about a parent-teacher conference that Ma-kun had thrown away. That night, when she asks Ma-kun directly about the situation, she finds out that he has become desperate, perhaps due to an inferiority complex about not having a mother. Worried about Ma-kun, Azusa decides to do something for her adorable little brother.