と is used to describe a past real event objectively whether it's a one-off event or habitual action. This と is often used in narrative parts of novels.
e.g.
国境の長いトンネルを抜けると雪国であった。
手探りで扉を開けると、縁側があった。
家に着くと、父も、母も、ちっともふだんと変らない様子で、いかにも何事もなさそうに私を迎えた。
Can I say this と is not in conditional form but it simply plainly refers to a set of circumstances? It's quite like とき in usage, isn't it? Thanks Toritoribe-san.