First line is always straight, it's the second one that might ruin the picture.

He watched as Lay carefully scribbled "wo ai ni" on his hand before smiling softly at him. He took the marker and wrote "saranghae" on Yixing's bare shoulder, earning a smack from the younger. "Hyuung~~ What are you doing?!! It's permanent marker and I have to wear a tank top tomorrow!" He smiled and kissed the soft skin, making Lay giggle. "Then it'll be as permanent as our love..." _ _ _ _ _ _ _ _ _ _