二階に

upstairs

→ 2階
phrase Rare #24,170
upstairs 二階 means “second floor,” and に marks the location or destination. Depending on the verb, 二階に can mean “on the second floor” or “to the second floor.”
JA: 荷物を二階に運んでください。
EN: Please carry the luggage upstairs.

荷物を二階に運んでいただけませんか

Could you carry the luggage upstairs, please?

子供達は一列になって二階にあがっていった

The children went upstairs in single file.

ジョンはとても大声で話したので二階にいて聞こえた

John spoke so loudly that he could be heard even upstairs.

私は彼が二階に荷物を運ぶのを手伝った

I helped him carry his luggage upstairs.

待っているまもなく二階に近づく足音聞こえてきました

As I waited, I soon heard footsteps approaching the second floor.