Herein lies the agreement: Sirius will play as Lily Evans, Evans will play as Sirius Black, to accomplish three tasks over the course of three days to acknowledge the difficulty of being the other party, especially when 'the other party' is an unrivaled gift from Merlin. James does not approve. Jily.

Lily gets dragged to Hogsmeade against her better judgement. But that's always been the problem, hasn't it? For one Saturday, she's willing to go without it. James/Lily.