Fics like The Unexpected Consequences of Amnesia

When a spell backfires and results in Sam losing a year’s worth of memories, Sam’s really not that worried. After all, Dean reassures him that he hasn’t missed much and for the first time in a long time, the supernatural world’s at peace. Except then Dean and Cas exchange a look. Except then Sam keeps seeing them sneak around at night, into each other’s bedrooms, or whispering stealthily into each other’s ears whenever they think that he’s not looking. So naturally, Sam just has to investigate. Or the one where Sam obliviously and almost single-handedly brings about the collapse of Dean and Cas’ marriage in the span of one week.

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