Atashi no Tame ni Kiss o Suru Otoko

There was a teenage boy who loved Yokujitsu,
who would tell you it was the best boxing manga in the world.

One day, he bought the special 50th anniversary edition
of the manga for fifty thousand yen
(after working very hard to earn that amount).

When he opened it... he found himself sucked into the manga world!!!

[From DLsite English]