Inu Koi Series: 1. Inu mo Arukeba Koi wo Suru 2. Inu mo Hashitte Koi wo Suru 3. Inu wa Yume Mite Koi wo Suru 4. Inu wa Maibyou Koi wo Suru 5. Inu mo Himitsu no Koi wo Suru