I Can Transform into a Two-Dimensional Character

What? Am I selected by the system? What? You want me to turn into a two-dimensional character to complete the system's tasks? What? The first task is to kill ten interdimensional dogs first? Wait, wait, wait! Although it's fun to be able to transform into a two-dimensional character. But is it a little unfriendly to me, a flower who has just turned eighteen, to hit and kill her as soon as she comes up? System: If you can do it, do it. If you can't, I'll replace you! Protagonist: Yes, yes! Of course! Wait! I'll go right away! Which fool would reject the system? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.