[Original Song] - Run! The Oath of The Turtle feat. Kousaku-P (Yowane Haku, Akita Neru)

[Original Song] - Overtime! ／(^o^)＼ feat. Kousaku-P (Otomachi Una SV || RINKO)

[Original Song] - Attention! This is a Human-Made Song feat. Kousaku-P (Yowane Haku, Akita Neru)

[Original Song] - Ashes of The Past feat. Kousaku-P (Hatsune Miku)

[Original Song] - Isn't Making Songs Hard Anyways? feat. Kousaku-P (Yowane Haku, Akita Neru)

[Original Song] - Boxed-in Utopia feat. Kousaku-P (Yowane Haku, Akita Neru)

[Full Album] - 工作はもう、飽きた寝る。feat Kousaku-P

[Original Song] - 222222 feat. Kousaku-P (Kagamine Rin, Len)

[1st Album] - 工作はもう、飽きた寝る。feat Kousaku-P (Crossfade)

[Original Song] - Reiwa Exhaustion feat. Kousaku-P (Yowane Haku, Akita Neru)

[Original Song] - Lunch Break feat. Kousaku-P (Piano)

[NEUTRINO] - Slowly! But healthily feat. Kousaku-P (AI Kiritan)

[Original Song] - Hurry up! Work! feat. Kousaku-P (Kagamine Rinto, Akita Neru)

[Questioning Brainwash Song] - Methylbenzene feat. Kousaku-P (Kagamine Len, Rin)

[Original Song] - La-La-Ri-La ☆ I Wanna Slack Off! feat. Kousaku-P (Yowane Haku, Akita Neru)

[Original Song] - CHECK! For the day! feat. Kousaku-P (Yowane Haku)

[Original Song] - Slowly! But healthily feat. Kousaku-P (Yowane Haku, Akita Neru)

[Arrange||Cover] - Tsuman'ne 10th Anniversary feat. Kousaku-P (Yowane Haku)

[Original Song] - The Melancholy of the Fake Diva feat. Kousaku-P (Kasane Teto)

[Original Song] - 100% Neru-chan! (lol) feat. Kousaku-P (Akita Neru, RINKO)

[Original Song] - Requiem feat. Kousaku-P (Hatsune Miku)

[Off Vocal] - CHECK! For the day! feat. Kousaku-P (Yowane Haku)

[Off Vocal] - Hurry Up! Work! feat. Kousaku-P (Kagamine Rinto, Akita Neru)