Series: Original - FUTANARI ITOKO EXTRA (Messy (efuya))

Futanari doujinshi by Messy (efuya), partially available on the artist's pixiv post.
It can be bought on the following links:

• 【Booth】https://messy.booth.pm/items/1518508
• 【DLsite】https://www.dlsite.com/maniax/work/=/product_id/RJ276516.html
• 【メロンブックスＤＬ】https://www.melonbooks.co.jp/detail/detail.php?product_id=622471
• 【FANZA】(※性器の黒線修正多め) https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_171204/