When you talk to characters in Rune Factory 4 sometimes a BTW (by the way) button pops up in the chat window. Press R and a menu pops up before the conversation ends that lets you confess your love to the person you’re talking to. When I played the English version of Rune Factory 4 I ended every conversation with a love confession. Most characters took it as a joke, but Forte, the knight that guards Rune Factory 4’s town, told me to stop joking around.
The BTW button has other uses like asking characters to go on adventure. Select this option and you’ll get an invite another character to join you in battle.
Rune Factory 4 is slated for release later this year.