Digimon Story: Cyber Sleuth - Hacker's Memory (manga)

Digimon Story: Cyber Sleuth - Hacker's Memory (デジモンストーリー サイバースルゥース) is an manga illustrated by Naoki Akamine.

Synopsis
Keisuke Amasawa goes to the DigiMarket, where he remembers how he got his partners, Betamon, Tentomon and Gostumon. Not happy, he challenges the owners of the market and has to fight against their Triceramon, Tyrannomon and Monochromon. Keisuke is close to losing, only for his partners to digivolve to Seadramon, Kabuterimon and Golemon. Ryuji Mishima, Chitose Imai, Erika Mishima and Wormmon arrive and Ryuji has his Cyberdramon help fight. They defeat the hackers, then force them to release all the Digimon they were keeping locked in cages.