For Caroline Li and Colin Wang, moving in together after dating for eight months was a matter of serendipity and urgency. Last fall, Mr. Wang, 28, was completing his final year of medical school at the University of California, Los Angeles, when he learned that the two-bedroom apartment he shared with one roommate had a mold infestation. He had to move out immediately, but had trouble finding new housing. At the same time, Ms. Li, 24, a registered nurse, learned that one of her two roommates was moving out of their $5,000-a-month, three-bedroom apartment near Santa Monica, Calif., in the middle of their lease. Ms. Li and Mr. Wang realized that they could resolve both of their issues by having Mr. Wang move in with Ms. Li and her roommate.

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Persons: Caroline Li, Colin Wang, Wang, ”, Li Organizations: University of California Locations: Los Angeles, Santa Monica, Calif