Board Thread:Questions and Answers/@comment-71.48.46.240-20141119213631/@comment-70.26.174.145-20141121032417

He actually skipped over 7-4. He originally wanted to release 7-3 and 7-4 together (3+4=7), but ended up only releasing 7-3. 7-4 seemed like a bad omen to him (four and death are closely related to each other) so he just went on to 7-5.