YunaGreyworth

so i read a manga ages ago and really wanna read it again but can't remember what its called. If you find anything like my description please comment

i remember aliens were on earth but no one knew apart from a group of people with these i think cubes that could transform into a weapon the mc has two a normal one and a red one made from the aliens his partner is an alien that betrayed his race. it starts off with the mc and the alien.