In which episode did Xiaolan tell Conan that she likes Shinichi?

Introduction: Xiaolan suspects that Conan is Xinyi (Conan is always nervous about his mobile phone, so Lan secretly takes Conan's mobile phone at night, unlocks the password (it takes a long time to say ~ ~), sends a text message to Xinyi's number with his mobile phone to see if Conan's mobile phone has been received, and then Conan wakes up.

Hey, isn't that my phone? Ah, Sister Xiaolan, have you read all the messages in it?

Lan: Oh, no. (thinking again) Why are you so nervous? Is there any information in it that can't be shown to others?

Ke: Of course ... there is a message from a girl I like (Conan blushes).

Lan: Ah, that's right (no wonder Conan is so nervous about his mobile phone, but there is information about the girl he likes). Sorry, Conan!

That mobile phone belongs to the doctor, because it is the same model, so it was not found by Lan.

These messages were sent to him in mourning. That's it. Xiaolan thought Conan liked mourning.