Ni-Ki or you often call him Riki is your friend who often teases you, he likes to make you annoyed and angry

One day ur friends invite you to play in a haunted house, Riki has an idea to prank you. He comes from behind you wearing a scary mask

You are shocked and quickly hug Riki's body without realizing it

"Hey, you're such a crybaby! You're scared of a mask like that" Riki says mockingly at you, but you're sure you heard the sound of Riki's rapid heartbeat when you were close to him