Originally, Casio had seven months. Now, five months and ten days have passed. The time he has left is not considerable anymore.
The obsession of the original body this time is rather special.
There's only one – it's to take down Black Rain Villa!
Any actions besides that cannot gain additional staying time, so if Casio wants to continue staying, he must take action against Black Rain Villa! Of course, his obsession is unlikely to direct him to tackle Black Rain Villa right from the beginning. There must be a process involved; any activity weakening the villa should also be feasible.
For example, deliberately failing to complete the regular task scheduled every three months. Enticing the Decayed Knight to pursue him, and then kill him!
For instance, damaging the buildings in Black Rain Villa and its various setups, rendering it non-functional.
Or, consider what Casio wants to experiment right now.
Fishing!
