'Pong' (Bank - Thiti) is a high school geek who belongs to a group of high school outcasts known as the 'Invisibles'. He enjoys letting his imagination run wild and drawing cartoons of a girl he likes. He doesn’t have the guts to ask her out because she belongs to a more popular clique in school. Pong’s cartoon illustration is the reason he gets to know a schoolmate named May, a nickname so common for Thai girls that whenever anyone talks about a girl named May, whoever is listening will ask, “May who?”
'May-Who' (Punpun – Suttata) is also one of the 'Invisibles'. May-Who and Pong have the same dilemma. She likes 'Fame' (Tor – Thanapob), a good-looking senior who is both student council president and the school’s star athlete.
On the outside, May-Who may seem like an ordinary teenager, and she is, except for her extraordinary ability to discharge electricity like a Tesla coil. Whenever her heart beats faster than 120 beats per minute, her body releases a powerful electricity charge. This, of course, makes her unable to ever get close to Fame without electrocuting him.
Pong accidentally learns about May-Who’s secret and promises to keep it a secret in exchange for helping each other win over their crushes.
Ironically, these crushes that May-Who and Pong harbor may cause unexpected sparks to fly between themselves as they overcome obstacle after obstacle together.