It's Bromance. I used to not like it very much. But then I began reading the manga, it's pure Bromance.

It's just like EreMin, JeanMarco, ReiBert and Springles (All bro-ish romance)

When did I begin shipping this? Well...Valentines day. That's right.

Although I didn't really know it was Valentine's Day the whole day so...only half a point I have here...

Mike is older and taller then Erwin. Taller than Bertholdt in fact. And Erwin is just... Erwin *raises shoulders confusingly

Why not?