illustrate convey recount
Many of my friends have experienced of a four-day step: on the first day, they meet each other and  [MASK]  their mobile numbers; on the second day, he sends her a short  message  saying how he has madly, passionately and hopelessly fallen in love with her; and on the third day, he  invites  her out to see a movie, then he holds her hand in  public  ; so on the fourth day, they become a common couple among the thousands of young  lovers  on campus.