Nicholas is a final year student, who is unable to graduate due to getting an F in a course because of an insufferable junior. based on semantic error

Euijoo falls for his neighbour, Nicholas who's 5 years older than him but the other only thinks of him as a kid. However, Euijoo's puberty completely changes him... Nicholas is in trouble

A sudden financial collapse to both family businesses, force the heirs into a legal contract marriage for a year. However, the heirs in question, have been classmates since years and hate each others guts.