[Matsumoto Drill Kenkyuujo (NAGANO)] Drill Grand Prix (To Heart) Hentai [松本ドリル研究所 (NAGANO)] ドリルぐらんぷり (トゥハート)

(CR37)[Matsumoto Drill Kenkyuujo, Zattou Keshiki (10mo), Touge no Ryoutya, S-FORCE(Serebi Ryousangata)] Shio Hato (ToHeart 2)

(C77) [Matumoto Drill Kenkyuujo (Naganoon, Nasu)] Manaka de Iku no? (ToHeart 2)

[Matumoto Drill Kenkyuujo (Drill Eternal)] Taichou Pinch de Arimasu yo (ToHeart 2)

(C80) [Matsumoto Drill Kenkyuujo] Aru Hi Dungeon kara Kaettara Guild ga Dream Nanchara ni Natteta de Gozaru (ToHeart2 Dungeon Travelers)

(COMIC1☆3) [Matsumoto Drill Kenkyuujo (Various)] TH2 Soushuuhen (ToHeart2)

(C69) [Matsumoto Drill Laboratory (NAGANOON)] Yuzupon (ToHeart 2)

(C81) [Matsumoto Drill Kenkyuujo (Naganoon)] Mitsutsubo Injoku Settai - Hostgirl Kousaka Tamaki Dono Ana demo Goriyou kudasai - (ToHeart2)

(C63) [Matsumoto Drill Kenkyuujo (Drill Eternal)] Drill Vanguard (To Heart)

(COMIC1)[Matsumoto Drill Kenkyuujo] Kusakabe-san to Shota Aki-kun (ToHeart 2)

[Matsumoto Drill Kenkyuujo (Drill Eternal)] Tamakin (ToHeart 2)