Emerging from the shadows of Toronto, PartyNextDoor (born Jahron Anthony Brathwaite in 1993) specializes in soundtracks for nightlife hedonism and romantic ambivalence. Beginning with his eponymous major-label debut, he’s blended themes of luxury with atmospheric style for songs that evoke city thrills and frosty cool (“Break from Toronto”). He can be the playboy, or he can be earnestly tender. For the Drake-assisted “Loyal,” he veers into dancehall and a lover’s ecstasy. On “Come and See Me,” he delves into an episode of playboy problems. Whether he’s taking a stand in a damaged relationship (“Resentment”) or reflecting on distrust (“Her Old Friends”), PartyNextDoor renders conflicting emotions with a combination of honesty and inventive style. In the process, he’s become a fixture of alternative R&B.