Ah, Excitement! Grandma's love embosomed in the ring

Godai decides that it's time for Kyoko to finally meet his parents. A bit nervously, he phones home (his parents don't know about Kyoko yet). His grandma helps things along by inviting them to come over (to Nigata Prefecture) right away - tomorrow. They take the train, and then taxi to the restaurant (and home) where Godai's Grandma and parents live. Later that evening, Grandma loans some money to Godai so that he can afford the wedding; then she gives an engagement ring to Kyoko. With the snow falling outside, all is well. Then there is a knock at the door downstairs. Godai goes to answer, and it's none other than Yotsuya, Akemi and Ichinose! So much for a quiet night...