Hi, typically you need to accrue a certain amount of romance flags in order to get a confession from/an opportunity to confess to an RO. Flirting with them outside of their orientation doesn't net these romance flags, so right now, confessing to them and being rejected on the basis of MC's gender isn't a planned occurrence in the game. The opposite can happen, though, where a character may misinterpret flirting or other signs from MC and confess, then be rejected on the basis of MC's orientation! Hope that helps!