One second he's in the kitchen and then when she goes to answer the door he's in the shower!? Why would decide to take the shower when you hear somebody at the door anyway and that was quick af too! It's almost impossible to be able to shower that fast...
He's got teleportation powers! Maybe he's secretly from the future and is hiding from an alien race who wants to get him because he's discovered their ultimate secret weapon against us earthlings!!! ...never mind...
I remember this was a video game and made zero sense and was shit! Just like the manga, eh? This a GUARANTEED waste of time! And this manga is suuuuupper shity.