Juno enters Pisces on February 23rd. Partnership agreements enter the exalted realm of relationship ideals- the concepts of unconditional love and fidelity, the soulmate, the sacrifices you make for love.
Because Juno is also about the power balance in a relationship, her transit of Pisces can emphasize who is being victimized or deceived. Sometimes that deception is self-inflicted - If you turn your partner into a deity, you're going to be disillusioned when they're eventually revealed as human.
In some cases, this transit can point to a dream relationship which doesn't exist - the "contract" you have with this person is one-sided, because they have no idea how you feel. Or, they've never met you (for example, a celebrity). Imaginary partnerships can be harmless and fun, unless you believe the terms of that agreement are real.
Positive aspects of this transit include agreements which enhance mutual creativity and compassion. Perhaps one partner is the other's muse. Or both partners agree to forgive, heal and look beyond an area of pain. With Pisces, it's very important that the contract (written or unwritten) is mutual - it's far too easy for one person to sacrifice everything.
A key date for this transit will be March 27th, 2018, when Juno conjoins Neptune (14 deg). Here is a peak moment of pure acceptance, sacrifice or release. A partnership may dissolve, or expand into something more. This could also refer to a relationship that's spiritual and platonic.
Either way, pay attention to the terms of the agreement, especially the ones that are unspoken. It will be tempting to assume that you're both on the same page, because no words are needed. And maybe this is true. But if the contract/promise you have in your head doesn't match what the other person is thinking, you're going to be disalussioned.
Juno will exit Pisces for Aries on April 28th, 2018.