It has to have romance (not subplot) No harem Told from the guys point of view Not BL World hopping or modern world Can be from novelupdates, royal road, fanfiction.net as long as it has what I asked For example here on novelupdates Boss Level Face-Slapping Specialist [Quick Transmigration] and Scum Male’s Whitewashing Manual
Please Be More Serious ( just ignore the translator's comments within the novel). This is also pure romance from guy's PoV