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pair of lovers; girlfriend and boyfriend
恋人同士がカフェで向かい合って話していた。
A couple sat face to face talking at a café.
恋人同士の旅行は思い出になる。
Traveling together as a couple creates lasting memories.
二人の交際が公になり、恋人同士と認められた。
Their relationship went public and they were recognized as a couple.