Operahouse Corporation developed full-voice Switch otome games are currently 33% off.
All five titles developed by Operahouse are currently on sale for $16.74 each.
Ayakashi Koi Gikyoku
Note: I have been told that the translation in this game has received a correction patch for the translation.
Sale is from December 20th, 12:00amPST to January 6th 23:59PST in the US store and December 31st to January 17th in the EU store.