Mameshiba Cubbish Puppy (2009)

Jiro is a 35-year-old NEET who lives with his parents. The sudden death of his father leaves his family broken. It was then that his mother mysteriously leaves his home. Jiro is confused by this and is left with nothing but a small Shiba puppy. The puppy has a small note attached to it, and Jiro ventures out of his home to solve the mystery.