Wait, Shion's dad is literally a zombie? Has this ever been mentioned before? Am I missing something?
I mean, the first couple chapters literally say she's a half-zombie and that her mother is a human. Even outside of that, there's been a few off-hand "this gruesome zombie thing reminds me of my dad" jokes from Shion.
Exactly, don't ask for her hand in marriage to her dad, we're not barbarians... Just ask her directly and then go to her parents with it as a fait accompli !