Sakurai-kun wa Youkya ni Naritai

Sakurai, who has always been a "gloomy person" since childhood, is determined to leave that version of himself behind. He sees entering the workforce as a chance for a fresh start. Armed with only the superficial advice he found online, he decides to make his debut as an "outgoing person"... But his plan falls apart on the very first day. Trying too hard to be outgoing, he acts overly friendly with Toba, who's rumored to be called a "demon superior." Coupled together with his self-hatred, Sakurai later runs into Toba in the restroom and breaks down in tears in front of him. But unexpectedly, Toba's reaction is strangely...?

(Source: Gentosha Comics, translated)