Honey^2 Skip!

Hidaka Ikumi lost contact with his older brother Tomo at a young age after Tomo was adopted by another family. Now in present time, with Ikumi at 16 years, Tomo had suddenly returned. Much to Ikumi’s surprize, Tomo had came back dressed as a woman. Or at the very least, a very girly man. What had happened to Tomo that would cause him to now dress like this and why did he return?
[From ShoujoMagic]:
Ikumi HIDAKA is a young man who lives with his grandmother and enjoys doing chores in his spare time. Then one day, his older brother Tomonori, whom he lost contact with when the boy was adopted by another branch of the family at the age of 5, returns. But why does Tomonori now look like a woman…!?