Time Travel Plus System Equals Invincibility and Becomes a Dog

Got hit by a truck and ended up traveling through time himself! With its own system and additional time travel, I thought I was already the chosen one! But, it turned out to be a cute... What a cheat! I am an upright person, how could I be turned into this thing... Ah... You can't eat this thing! But it smells so good! Hahahahaha... I am so strong and good, I want to be the strongest... Wait... Can I imitate? Hee hee... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.