It was Christmas time six years after Korosensei's death. Nagisa and Kayano are now married and enjoying their first Christmas together married. As they decorated the Christmas tree, Nagisa and Kayano heard a familiar jingle on the radio, and Nagisa said, "Jingle Bells, man that takes me back to singing Carols with my mom." Kayano smiled and said, "Same here, Except with my whole family." Then they both said, "And we always sang Jingle Bells. Wait what?" They then laughed before Nagisa said, "Looks like we both loved singing Jingles Bells." Kayano nodded her head and said, "Wanna sing it?" Nagisa looked at his wife and said, "I was hoping you would say that." Nagisa then pulled out his phone and began playing the music as they sang and danced together
[KAYANO]: Dashing through the snow
In a one horse open sleigh
Over the fields we go
Laughing all the way
[NAGISA]: Bells on bobtail ring
Making spirits bright
What fun it is to laugh and sing
A sleighing song tonight!
[KAYANO & NAGISA]: Oh, jingle bells, jingle bells
Jingle all the way
Oh! what fun it is to ride
In a one horse open sleigh, hey
Jingle bells, jingle bells
Jingle all the way
Oh! what fun it is to ride
In a one horse open sleigh
[KAYANO]: Now the ground is white
Go it while you're young
Take the girls tonight
And sing this sleighing song
[NAGISA]: Just get a bobtailed bay
Two forty as his speed
Hitch him to an open sleigh
And crack! You'll take the lead
[KAYANO & NAGISA]: Jingle bells, jingle bells
Jingle all the way
Oh, what fun it is to ride
In one horse open sleigh, hey
Jingle bells, jingle bells
Jingle all the way
Oh, what fun it is to ride
In one horse open sleigh
Oh, what fun it is to ride
In one horse open sleigh...
Nagisa and Kayano end it with a kiss under the Mistletoe before Nagisa said, "You have such a wonderful singing voice Kayano." Kayano smiled and kissed Nagisa on his lips before she said, "Same goes to you handsome." Nagisa smiled and the two kissed again.