Hey... Do You Know How Babies Are Made? -From Today We're Brothers-

Summary

Hey, Yuuma. Do you know how babies are made?"After coming home from his part-time job one day, Yuuma, an only child to a single mother, finds an unfamiliar boy in his home. After hearing him out, Yuuma discovers that his mother has remarried and now he has to live with his new over-friendly step-brother, Aruto. However, Yuuma is unable to get along with him and is suddenly pushed down and kissed. The more time the two boys spend together, the more confused Yuuma becomes about his own feelings for his younger brother. Could he really be falling for him!?