Japanese branch of the Canadian company Harlequin.
The vast majority of the works Harlequinsha publishes consist of romance novels by English authors that have been drawn in manga form by Japanese mangaka.

プティル reads as Petir, not Petille.

Do not add print label.

Harmony magazine is combined into Harmony by Harlequin for ease of data collection. Both are the same because they are produced under Harlequin (previously Ohzora Shuppan). The actual name is Harmony but it is the same either way to avoid confusion.