It's not the only way, but he really didn't seem to have many interests other than fornicating and playing videogames with his sister. No idea if Japanese people are more serious when choosing what they are going to do for college, here we just randomly decide on something because it sounds cool and then most people end up not liking it or using it at all.
With that said, this manga makes me wish I had a sister...
With that said, this manga makes me wish I had a sister...