Title: (C83) [Yorokobi no Kuni (JOY RIDE)] Futanao x Reikan (Smile Precure!)
JPN Title: (C83) [ヨロコビの国 (JOY RIDE)] ヨロコビの国 Vol.18 ふたなお×れい姦 (スマイルプリキュア!)
Joint release between me, Little White Butterflies and Funeral of Smiles. Psyburn21 of Funeral of Smiles commissioned me to scan this for him along with Doujinshi DB 1 and Doujinshi DB 2. So look forward to those cheating wifes.
I simply love the shapes JOY RIDE gave Reika in this particular doujinshi, no wonder Nao wanted to impregnate her.
You can view the doujinshi here