Makoto's next mission is to get Haruko a ring for her birthday. Since Sadaoka can tell the size of a ring just by looking at the finger, Makoto decides to train with Sadaoka to determine the size.
Makoto begins to get along with Haruko's father, Daichi. However, shortly thereafter, Daichi accidentally learns that Makoto's ex-girlfriend is a criminal, and now opposes the relationship with Haruko.
Makoto and Haruko decide to go on a trip together. The mysterious man finally reveals his true identity to Makoto and gives him a ridiculous challenge as the final test.
The mysterious man disappears, and Makoto loses the memory of the man as well. Because of the disappearance of the man, Makoto and Haruko's fate as a couple is no longer secure.
