The first season so much in a sense you should try it if you have already like this show, The second season of Waikiki would depend on if you like the first season or not but I will definitely tell you to have a look at the 1st season
Queen of Tears: I enjoyed the "Heart-Wrenching Reset." It used memory loss to strip the characters down to their core, forcing them to fall in love again without their past baggage.
memory loss for feeling guilty
memory loss for feeling guilty