Cheerful Amnesia, Vol. 2 — Oku Tamamushi

No matter how upbeat Arisa is about her amnesia, losing her memories has brought its share of problems. She can't remember her girlfriend Mari's favorite foods, the anniversary of their first date, and -- most important of all -- what they got up to in bed. Mari proposes an overnight trip to a hot springs resort, which would be the perfect chance for them to clear the air and put their complicated feelings into words. The only issue? Arisa will have to start working again if they want to pay for it!