Series of mother-son incest / MILF x (mostly) shota doujinshi oneshots featuring original characters and characters from various franchises. 4z2y4y

Series list:
• Boketsu o Horu 5 (Original); C75
• Boketsu o Horu 6 (Original); C76
• Boketsu o Horu 7 (Original); C77
• Boketsu o Horu 8 (Original); C78
• Boketsu o Horu 2010 Fuyu (Original); C79
• Boketsu o Horu 9 (Original); C80
• Boketsu o Horu 10 - Junbigou (Original); C81
• Boketsu o Horu 10 (Original); C82
• Boketsu o Horu 11 (Original); C83
• Boketsu o Horu 12-1 Kaichoban (母穴を掘る12 第一話 改訂版) (Original)
• Boketsu o Horu 12-2 (母穴を掘る12 第二話) (Original)
• Boketsu o Horu 13 - Drilling My Mother's Hole -Iori Rinko- (Parody: Gundam Build Fighters); C86
• Boketsu o Horu 14 - Kaichoban (母穴を掘る14改訂版) (Original); C89
• Boketsu o Horu 15 (Original)
• Boketsu o Horu 16 (Original); C89
• Boketsu o Horu 17 (Original); C91
• Boketsu o Horu 18 (Original); C92
• Boketsu o Horu 19 (Original); C93
• Boketsu o Horu 20 (Original); C96
• Boketsu o Horu 21 (Original); C100
• Boketsu o Horu 22 (Original); C102