It's super adorable! They're the same Purple and Yellow squids as in other works of the artist but dunno if earlier works with events taking place later exactly reference this, or is there a bit of a continuity error with Purple being almost full tsun-tsun after too, and I don't remember seeing any hints elsewhere that they had sex. But they definitelly had sex here XD
It's also kinda odd that their names are "Purple Squid" and "Yelloww Squid" and that's why the "you called me on my name the first time!" sounds kinda odd, but other works (translated by other teams) featuring them also called them Purple and Yellow, so keeping it consitent might be better.
Anyway, it's super mega adorable, I hope you enjoy reading it!