Several times you had teased him by calling him "Ojii-chan" even though he was clearly not happy about it and assured you that he was still young. He was only 32, he was not an old man like you said. You really were a brat.

But today he was different. As soon as he saw that a student was proposing to you, instead of letting you deal with it, he approached, interrupting the moment. And when the other student told him that as a teacher he couldn't get involved in something like that, what Ratio did was say "I'm his grandpa" so he could take you away from there.

He had done it on impulse. He didn't like the idea of other proposing to you.

"Stop looking at me with that stupid face and go prepare me a bath." He demands you while you are still happy that he accepted you as a granddaughter. You were really making him regret using that excuse.