Start with the date itself. A line such as YY.MM.DD uses a two-digit year, which is only a short form. Read the full year from the context around it, such as the date the teaser was posted or the year printed elsewhere in the post. Then read the month and day in that order. The weekday in brackets, for example SAT or SUN, is a built-in check on your reading: if the weekday and the date do not agree on a calendar, do not guess which one is right. Wait for an official correction before you plan anything around it.
Next, look at the start time on each line. In a multi-night run the time can differ from one night to the next, so a Saturday line might say 6PM while the Sunday line says 5PM. Write each night's time down separately instead of assuming one time covers the whole run. Also remember that the listed time is the show start time. Doors or entry may open earlier, but a teaser like this usually does not state that, so do not treat the printed time as the moment you should arrive at the gate.
The pin line comes next. It names the venue, and unless separate venues are given for separate nights, you can read it as one venue for every listed night. That is why we call it Venue A in this guide: one name, one place, all the dates above it. A teaser can leave out the city when the venue name already implies it, so if you are not sure where Venue A is, check the venue's own page rather than guessing. Do not assume a city that the post itself never states.
Finally, handle the time zone and the practical details. A time followed by KST is in Korea Standard Time, so convert it to your own time zone and keep the date in mind, because the conversion can move a show onto the previous or next calendar day for you. A teaser like this rarely gives ticket details, so look for a separate ticketing notice from the act or the promoter. Schedules can change, so whenever a newer official notice disagrees with the teaser, the latest official notice wins.