Ending here as One Shot is already lovely but expanding it into long story, I think it'll even be more fun & intriguing with more complicated plot as Sato's surname is 'Inugami' [reminds me of 'Inuyasha'] his ancestor may be bloodline of Fox God which means Sato can has a Baby Fox God & somehow become immortal like Haku. The source of grudge between Haku & that Black Fox Demon is also interesting.
Ending here as One Shot is already lovely but expanding it into long story, I think it'll even be more fun & intriguing with more complicated plot as Sato's surname is 'Inugami' [reminds me of 'Inuyasha'] his ancestor may be bloodline of Fox God which means Sato can has a Baby Fox God & somehow become immortal like Haku.
The source of grudge between Haku & that Black Fox Demon is also interesting.