Web comic - Page 97

Wakui is living a lackluster college life. His only pleasure was correspondence. The correspondence that started with a letter he found in the university library became the center of Wakui\'s life. However, one day, he received a letter containing information that his pen pal was not supposed to know. Wakui suspects that the correspondent is someone he knows, and he begins to suspect the three girls he is involved with. However, the three girls are all good singers...

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One day, countless dungeons suddenly appeared in the world, and human beings ushered in the \"dungeon era\". The boss of the abyss-rank dungeon, Adesalai, was killed by human players using despicable means. Unwilling, he was reincarnated in a weak and useless player also accidentally opened the exclusive boss system, using the system to conquer the dungeon and become the special ability of the dungeon master, he started his own road of revenge.