Woo! Uncle has a blue-eyed sweetheart?

One day, Fujinami receives a letter from Spain. Fujinami is astonished. Something has been going wrong since that day. A few days later, Spank witnesses Fujinami meeting a mysterious Spanish woman. I'm desperate to explain to Aiko, but she doesn't trust me at all. However, one day, Aiko accidentally finds an engagement ring in Fujinami's atelier. Aiko is shocked. Actually, this woman is called Ilia, the younger sister of her daughter Maria, who Fujinami thought of getting married a long time ago. I came to tell you about my sister who was seriously ill and stopped. Maria had long since disappeared, but Aiko and the others who learned about the situation come up with the idea of having a wedding 20 years late for Fujinami and Maria.