Mushroom Me and the Princess

I am a mushroom, and the princess is human. The princess possesses a mysterious power and can summon mushrooms. But at some point, the princess started making a troubled face whenever mushrooms appeared. I only want to help the princess, but I don't understand why she won't smile at me. I want to become human and protect the princess from those who bully her. Then, my mushroom older brother said to me: "Is that something you're doing for the princess's sake? Or is it just something you wanted to do for yourself?" This is a story about "me," a mushroom who loves the human "princess." ※This is a spin-off of "The Mushroom Princess Who Guards the Dragon ~ When My Betrothal Was Broken Off by Fate, a Perverted Mushroom Came ~" You don't need to have read the main story to enjoy this.