This manga has already referenced Dragon Ball and a handful of other works that are slipping my mind at the moment. I'm actually wondering if I missed a Jojo reference somewhere.
Also, LOL at the shy xenomorph embarrassed at Rentarou and Kusuri kissing.
On this reread, I only just now noticed that Meme's plugsuit in the Evangelion parody is personalized — where Rei's has "00" on the chest, she has "めめ", her name in hiragana. It's just that the font makes the latter look like the former.