Substitution Alkanes Problem

[Taniguchi-san] Migawari Ichinichi Idol | One Day Substitute Idol (COMIC Unreal 2012-08 Vol. 38) [English] [SaHa] [Digital]

Any girl can do it! Bitch Zukan-I could have a harem if I solved various problems of Saseko～

[Gody] Yes! Problem - Momoiro Panic Gakuen

Mama ga Kawari ni | Mom's the Substitute!

(COMIC1☆4) [Stapspats (Hisui)] Double Battle de Daijoubu!! Kamo... | Double Battles Are No Problem! Probably... (Pokémon) [English] {doujin-moe.us}

Holdup Problem RELOADED

Kissing Number Problem

[EKZ] SUBSTITUTE エルフ

(C85) [Shinjuku Koma Gekijou (Komagata)] Hold-up Mondai RELOADED | Holdup Problem RELOADED (IS <Infinite Stratos>) [English] [RapidSwitch] [Decensored]

Helping with insomnia problems

人間便器18号

[Suruga Kuroitsu] Ippatsu Kaiketsu Onayami Soudan ~After~ | Ultimate Solution Problem Consultation ~After~ (COMIC Koh 2018-10) [English] [Digital]

(COMITIA113) [ZOAL (LENA[A-7])] Mondaiji Uehara | Problem Child Uehara [English] [ATF]

Anoko wa Mondaiji 2 - That child is a Problem child.second

(C93) [Renainou (Mizuyuki)] Mondaiji no Shitsuke | Discipline for a Problem Child [English] [Team Koinaka]

侵略性爭.骆越演义.南蠻西南夷列傳

[Aihara] Maiden Problems

Substitute Girlfriend