She slides the drying paper over to her gently, scanning it for her mistake. Her keen eyes find it easily, she points at it with a raised eyebrow, turning it to him to show him the patch of grey under the treetops. "You sure about that?" She asks, leaning back and glaring at the ceiling.

"It's not noticeable." He replies earnestly.

She nods, standing and looking at the painting. "You did really well, best I've ever seen." She nods, walking into the kitchen and grabbing two bottles of water, she slides one over to him, sitting back down next to him and taking a gulp of it.

He sips the water. "You did good too." He insists. "You did an entire tree, and it looks beautiful."

She bursts out laughing, spitting her water on the counter, she grabs the counter for support as she doubles over in laughter.

"What?" He's a bit taken aback by this.

Her fits of laughter turn into giggles as she wipes away amused tears from her cheeks. "Oh gosh, I needed that, thanks Tirou." She says, standing and grabbing a paper towel to clean the counter. "Your so innocent, it is adorable."

"U-um!" He doesn't know how to respond to this. His face gets a little red.

She giggles as she sees his red face, she walks past him and pats him on the cheek. She quickly skips outside with a final giggle.

If there's a way to cause errors in people like you can in a computer, she's just done it.