Kinyoubi no Houkago wa Houshi to Kiss wo

Ishigami often hangs out with delinquents, which gives others the impression that he's a "scary" guy and isolating him from his peers. In order to help restore his image, he pairs up with Suzumura, a member of the disciplinary committee, to do community service. Suzumura happens to be famously flirty, and after finishing the community service, he suggests some kissing practice...
(Source: Pixiv Comic, translated)