Don't Worry, You're Invisible

You touch a creature, and that creature must succeed on a Wisdom saving throw or become affected by your charm for the duration. The affected creature believes that you have turned them invisible and will behave as such. Creatures that can't be charmed are immune to this effect. The creature ignores subtle signs that the invisibility isn't real; they regard things like direct eye-contact from others, or the fact that they can still see their own limbs as inconsequential quirks of the spell. If something directly engages the target or does something explicit to indicate that the target isn't invisible then the affected creature may reroll the save. On a failed save they become more sure of their invisibility and can't be convinced otherwise until the end of the spell's duration.