We Had a Time-Travel Dinner Together, and the Whole Class and I Cultivated Immortality

In the midsummer of July, the college entrance examination is over, and a vision suddenly occurs at the graduation dinner. The whole class travels through time to enter the world of immortality. They support each other, enter the secret realm, slay monsters, gain immortality, and reveal human nature. However, the conspiracy about time travel behind this has also quietly come to an end (immortality + campus + micro fear + comedy) (you can eat it with confidence without any blood)