The "Gear" is one of the engineering mechanical devices in the cogwheel system (as in a clock). Having one signifies that one is a student of the Faculty of Engineering. However, to get one, all engineering freshmen must first undergo the SOTUS (acronym for Seniority, Order, Tradition, Unity, and Spirit) system. Arthit, one of the third year seniors, often abuses his power over the freshmen by making them do things against the rules. Freshmen students are practically powerless to complain or resist any orders given by their seniors. Arthit was seemingly unstoppable until Kongpob stood up against the abuses by the former. Continual encounters between the two developed from animosity to something much more affectionate.
Based on a BL novel by BitterSweet.
To show gratitude to her adoptive father, Rin Rapee accepts to disguise herself as his real daughter and marry Saran, to keep the promise their fathers had made in the past. Saran is a cold-hearted guy who suffers from his previous love. Although he knows that Rin's adoptive family has deceived him, he does not wish to return his bride, since he gets to know her beauty and kindness.
Love slowly grows. But soon their love is tested, when Duangsawad, his ex-lover, returns to him, while Rin also feels guilty with the secret she is hiding from him.
