Childhood Sweethearts, Let the Years Grow Warm

She told him, “There's a guy who keeps giving me chocolates. It's so annoying!” He answered with a stern look, “You're not allowed!” She told him, “There's a guy who keeps writing me love letters. I hate it!” He answered with a stern look, “You're not allowed!” He told her, “I like you. Be my girlfriend.” She copied him. “You said I'm not allowed!” He smiled slyly. “If you're with me, then it's allowed.” “Then what do you call it?” “That's called childhood sweethearts, growing up together and falling in love.” Tsundere, secretly affectionate childhood friend + cheerful, energetic girl next door = 100% sweetness! (√ Super sweet romance, √ updated daily, √ guaranteed completion)