Responses
Plus, in chapter 11 of the epilogue, when his mom thought that someone broke up with him, she didn't use indications wether the person who "dumped" Felix was a female. She just cheered up Felix without mentioning the gender. Ahh I love the mom(Though this could just be because of translation differences)
In the end, Felix's mom still don't know about these two but... When his mom say, "Now mommy is curious about this really handsome boy you met~". She will support them no matter what, i promise(▰˘◡˘▰)