A lovely little epilogue to the show that helps to really solidify the bonds between the characters and does away with any lingering fears or insecurities they may have still had about forming a permanent family unit together.
I was a bit worried by the summary as I absolutely detest the miscommunication trope, but those worries were absolutely unfounded. The characters actions and thoughts are all perfectly reasonable and in character and the "conflict" is resolved very quickly and satisfactorily.
The only thing I can think to criticise is that I personally would have liked to see just a touch more physical closeness between Minoru and Yutaka, just a simple hug or something of the sort, but honestly the deep love and affection between those two is always so palpable that any physical display is hardly necessary.
If you liked the main show and want a quick watch that is guaranteed to make you smile, then give this a watch.