Do I need to download an app to watch After I Pretended to Die, the CEO Went Completely Mad?

No. It plays in any mobile or desktop browser, so there is nothing to install.

After I Pretended to Die, the CEO Went Completely Mad — Watch Free (15 Eps)

Where can I watch After I Pretended to Die, the CEO Went Completely Mad online for free?: All 15 episodes are free on dramatap and play straight in your browser — no app download and no account needed.
How many episodes does After I Pretended to Die, the CEO Went Completely Mad have?: 15 episodes in total.
Do I need to download an app to watch After I Pretended to Die, the CEO Went Completely Mad?: No. It plays in any mobile or desktop browser, so there is nothing to install.