And finally time for that long awaited happy wedding. Love the superposition between the couple's video (Yukari's father: "I'm so glad we raised such an upright kid") and the debauchery taking place in the other room.
At this point Seiji is so used to the dynamic between the two couples, that his reaction to finding out about the vibe in the middle of the wedding ceremony amounts to a "heck Yukari, what am I going to do with you?"...and off to that happy ending we go.
****
Story could perfectly end here given that last page, but there's no text confirming it. Anyways, if an epilogue come out, I'll share it here as usual.
I agree, last page would be a good spot to end the series, although if Rojiro/ikippa!!comics want to extend the series a little bit more, they could add a honeymoon arc.
The honeymoon arc could be pure vanilla (Seiji and Yukari only) and showcase Seiji´s growth (both in technique and understanding of what Yukari wants i.e. rougher sex), or it could have more swinging or a both. More swinging and then then ending on vanilla to show growth from both and show they are more than happy with each other in the bedroom aspect (Seiji still hasn´t shown that he can please Yukari, although he might be doing so, just not explicitly shown in the series), or they could just do more swinging to show that they are both happy and continuing with the lifestyle post marriage (although it would be a bit redundant as these last two volumes have already shown how they are all happy with the swinging but it could show that they are continuing post marriage).
But, I still agree with you, ending it here would be a good end for the series, especially with the last page. Although getting more scenes out of the main four would also be good too, especially since I like the managaka´s artstyle, and they have improved/changed the art a bit since the start of the series (this is their first published manga series...i think).
Also nice to see the two kouhai at the wedding albeit just 1 panel and I´m sure they know something is up. If there is an epilogue, perhaps they could be part of it to end the series with all characters present (well maybe not the parents though :) haha ), but having the kouhai join again would just be involving too many characters again which may detract from the main four, plus their story kinda wrapped up already so no point bringing them back in again. Ending it here as is would still be good since all the characters in the series are already present anyway.
Sorry I think that series has probably ended. I quickly looked at the author´s twitter and they don´t mention the series at all (I only briefly looked at the first few posts). The last twitter post i could find mentioning that series was https://gplinks.co/cwMt in March 2019 about the release of episodes 4-6. https://www.zff.co/BhvgY is probably the site the series can be bought from, and from my understanding episodes 1-3 are in the first volume, and 4-6 in the second. I think it´s very likely that the author or publisher had ended the series. The author was mentioning having fun doing some skeb requests on their twitter so they may have moved on or are doing those on the side (maybe?). I didn´t dig very far on the author´s twitter just the first few posts so i may have missed it if it was further down.