Buy N'EX + Suica combo at Narita
Take N'EX to Shinagawa
Put luggage in locker at Shinagawa
Use Suica for Yamanote line ride to Shibuya and back to Shinagawa.
From Shinagawa, use Suica on Keikyu line to Haneda
If any remaining SUICA balance, use it to buy snacks
Get a refund on the SUICA deposit at Haneda