Help find this manga!

Basically it’s of these teenagers who get sent to space thinking it’s a trip for them. But really it’s their parents who wanted to have them die in space and take over their bodies! That’s basically the story from what I remember. I remember some of the character though, one of them had female breasts but male genitalia. One of them did some sort of sport I think track. I think there were around 5 people in the space ship. Not really sure though. I read this about 6-8 years ago and I often think about it. If someone can help me find it that’ll be great.