Complex sentence: Takumi talks to the Chief asking if he could use the facilities to revive Mari and agrees to only if he became a member of Lucky Clover by killing Sawada to which he said is impossible for Takumi because he isn't an Orphnoch.
Split into simpler sentences: Takumi talks to the Chief asking if he could use the facilities to revive Mari. The Chief agrees only if he became a member of Lucky Clover by killing Sawada to which he said is impossible for Takumi because he isn't an Orphnoch.