[Nishikousaka Kouhei] Kimi to Houkago
[Kouhei Ishihara] Cosplayer Ayaya
[Ishihara Kouhei] Tonari no Venus Vol.3 (Chinese)
[Ishihara Kouhei] Tonari no Venus Vol.2 (Chinese)
[Ishihara Kouhei] Tonari no Venus Vol.1 (Chinese)
[Ishihara Kouhei] Lucky Boy (Chinese)
[Ishihara Kouhei] Anata nimo AngeI Vol.4 (Chinese)
[Ishihara Kouhei] Anata nimo AngeI Vol.3 (Chinese)
[Ishihara Kouhei] Anata nimo AngeI Vol.2 (Chinese)
[Ishihara Kouhei] Anata nimo AngeI Vol.1 (Chinese)
[Ishihara Kouhei] Lucky Boy (Chinese)
(Kouzaka Kouhei) Sisters Natsu No Saigo No Hi
[Ishihara Kouhei] Shin Anata ni mo Angel [Digital]