I’ve gathered here 4 volumes created by Pinvise, the Sparkling Vacation series.
Namely, each volume is called:
– Sparkling Vacation
– Sparkling Vacation @ Fes
– Sparkling Vacation @ Home
– Sparkling Vacation @ Home Plus
Save Home Plus (start with that one, it’s not the first in publication order, but it’s the first in story order), the 3 other volumes are in full colour. Each of them shows the carefree sex between a bubbly curvy girl, entering adulthood, and her 4 years younger male childhood friend (the age gap doesn’t make him a shota, but in one volume, the mangaka goes overboard, sorry about that), that she likes to tease and spend fun time with (of course, she won’t won’t admit it out loud, but she likes it more than as just a friend, etc.)
And… well, that’s it ^^ I wasn’t a complete fan of the colourization, and I feel Pinvise has done better volumes in the past, but that was still pretty neat and highly enjoyable 
Release credits are for a good number of people, I noted along my read: Abs, Kirisaki_Shin, Danky, Ozen, Axalon, Osura, Odj, Meterion, Jumi, Final, RRR, Lyncs, Final, Confused, Doomr, Frostbite, Nuci, Sel, Sarah, Miaomix, Samwais, CapableScoutMan, Fyapper, A-Psy, NeVMiku, Megaton, and Longsworduser, from RedLantern TL. Thank you very much! 
For more awesomesauce, see The list of the works by Pinvise on Hentairules!
