1. Uke works in the kindergarten where seme picks up his niece. Uke stands in as his twin for a date to meet his brother's new boyfriend not knowing the boyfriend is seme's twin. Seme also stands in for his twin when uke's twin gets worried. They both have their date and ended with a kiss which the uke felt guilty for.
2. Brokenhearted uke went to the carnival only to be mistaken by a child for their kindergarten teacher (first uke). Here he meets seme. Meh.
3. Years later, two childhood friends grow up together. Uke confessed to seme that he likes him but seme said he likes the teacher (first uke). Uke remembers until they reached high school and seme began approaching him.
Kuro X Koi