Hogwarts: All Four Roommates Are Time Travellers

When other people came to Hogwarts, they would either go crazy inward or stick to Harry to take advantage of their opportunities. Ryan just wants to practice in a low-key manner, use the [Secret Realm Exploration System] to fill up the exploration progress, unlock growthable magical and forbidden spells, and safely complete the age of magic. As soon as he moved into the Gryffindor dormitory, he noticed that his roommates were acting strangely. The timid roommate can always avoid being killed; the dull boy casually talks about the theory of magic in the future; the extroverted boy always makes jokes about otherworldly things. There are four beds and four people, all visitors from time to time. Everyone is good at disguise, pretending to be a local wizard, thinking that they have a unique foreign identity! Some people memorize the plot to avoid disaster, some people fail to remember the plot and often overturn, and some people cherish their lives and act carefully every step of the way. Several people tested each other, tried their best to tell lies, and the inner drama continued, causing a lot of funny things in the school. Ryan watched with indifference, entering the castle and the secret realm of the forbidden forest alone, and accumulated enough progress to unlock exclusive spells. Unable to hide the flaws, the four of them showed off their cards late at night: Stop acting! The four time-travelers were messing around together. Without taking away the highlights of the original work or changing the main plot, they joked and joked every day, the secret realm became stronger in private, and all members steadily counterattacked. Voldemort wondered: Something is wrong with these students. Wait, don't touch my Horcrux! Dumbledore sighed: The four teenagers are quite like me back then... Harry was helpless: You are all capable of predicting what will happen next, am I still the protagonist? [Multiple people travel through funny pulls + slow upgrades in secret realms + evolved forbidden skills + partial original style + unit plot breaks are more harmless]