Usefully
Even if he had just remained a teacher at a local middle school and did his volunteer work on weekends, Saeki still believes he would've been completely content.
However, one day, whilst playing beach volleyball, he is randomly scouted by a talent agency. The next thing he knows, he is booking national campaigns with Armani, Calvin Klein, and finally going so far as to be featured on the cover of Vogue. Shirtless.
Take that, Konomi. "Uselessly handsome", his (tightly-toned) ass.