Hate My MIA!

Maizawa is still bitter about the fact that Miya, his ex-classmate, stole his girlfriend. His relationship with Miya, who is his nemesis, continues even after he enters the workforce, and for whatever reason, the two work at the same company. The charismatic Miya is good at his job and popular with both men and women. Miya's daily life is filled with sparkling brilliance, and Maizawa is depressed in the shadow of Miya. His only emotional support is a secret account operated by Miya...! The way he posts naughty pictures under the name "MIA" makes Maizawa feel superior to Miya, as if he has Miya's weakness.

(Source: Fusion Product, translated)