Hair / Clothes from the following pictures ;

kingofthesnow2015

This is blaine anderson from glee, also darren criss actor

I really like these kind of cardigans and the blazers

also his hair is really nice

is there anything like this? mostly the cardigan?

Victor_B

GaoDan School Uniforms 21 for Genesis 3 Males
GaoDan School Uniforms 20 for Genesis 3 Females

Short Hair for G3M and G8M

nonesuch00

Actually the hair is pretty close to this:

https://www.daz3d.com/timeless-male-hair-for-genesis

Although you may want to for more realism, use OOT Hair Material product from Renderosity or one of 3 of Slosh's Hair Material products in the DAZ Store. If you are going to but just one of those I think I'd buy the newest from Slosh but in 2nd I'd buy OOT's 2 products from Renderosity (I just used it yesterday & it works great for iRay).