You are correct. It was Vamp-sama. I went back and read the first few chapters. Really made me appreciate how their relationship has changed so naturally.
"IT Engineer" is one of the vaguest job titles ever. It could be anything from a geeksquad cashier to federal communications security expert to wordpress webpage user...
his suit seems incredibly simple on first glance, what with just the head being anything special - and yet also incredibly impossible to pull off in 3d, at least with the eyes and mouth not being stuck in a permanently frozen expression.