This is the original novel for the comic and audiobook My Self-Discipline Is Simply Unbeatable.
"Lu Shiyao, you know, I always thought my eyes could only see defense towers and crystals. But after I met you, all I could see was you."
[Ding! Congratulations, Host. You confessed on time. Emotional Skill attribute +1.]
"Yaoyao, I don't care about anything else. I'm a lousy person, but you are my one and only line I won't cross."
[Ding! Congratulations, Host. You confessed on time. Emotional Skill attribute +5.]
"In this life, I see no one but you. Everywhere I look, it's you. To me, all living things are grass and trees, but you alone are the verdant mountains..."
"Look at him. He's so devoted to you. He's confessed to you every day for ninety-nine days. Even a heart of stone should have warmed by now, don't you think?"
"Ninety-nine love confessions every day, and he hasn't repeated himself once. What's even more remarkable is how persistent he is. Even I'm touched."
"What a shame. If I were as pretty as you, I'd have gone for him, even if people called me a cougar."
[Ding! Congratulations, Host. You have persisted for ninety-nine days, confessing ninety-nine times a day to the woman everyone agrees is a goddess. Self-Discipline mission complete.]
[Ding! Mission rewards: one Marrow-Cleansing Pill, ten Foundation-Stabilizing Pills, and one string of Heart-Ice Jade beads.]
Li Dan skipped all the way home.
Lu Shiyao: "Tomorrow is the hundredth day. I'll give him an answer he'll be happy with."
The next day!
"Where is he?"