1. Himitsu 01 "4-gatsu no Owarigoro" (卑蜜(ひみつ)01『4月の終わり頃』)
2. Himitsu 02 "Zoku 4-gatsu no Owarigoro" (卑蜜(ひみつ)02『続・4月の終わり頃』)
3. Himitsu 03 "Kuchidomeryou" (卑蜜(ひみつ)03『口止め料』)
4. Himitsu 04 "Yakusoku" (卑蜜(ひみつ)04『やくそく』)
5. Himitsu 05 "Gomen ne" (卑蜜(ひみつ)05『ごめんね』)
6. Himitsu 06 "Ima Koko de" (卑蜜(ひみつ)06『いまここで』)