I try to predict an anime's ending by watching its opening

People love anime openings. The fantastic beats and the stimulating visuals. However, each opening tells a story, and a long held belief is that openings spoil the story. Today, I take that belief to the test by watching an anime I have never seen before through its opening and predicting what happens to see if I am correct.

Original Video Concept:    / @scottcramer  

Timestamps:
00:00 - Do anime openings have spoilers?
01:26 - My first time seeing an anime via its opening
02:55 - Random Anime Generator
04:11 - Watching the opening for the first time and making predictions
10:52 - I watched the anime, and I was wrong
20:11 - Minor grievances
21:14 - A "historical" anime
24:58 - Conclusion: Can you predict an anime by its opening?
26:18 - Conclusion: Can an opening spoil the anime?

Music (in order of appearance):
A Delicious Apple - Luna: Moonlight Thieves
88 - LM.C (Katekyo Hitman Reborn! OP 4)
Your Smile - Luna: Moonlight Thieves
Bucchigire! - Takanori Nishikawa (Bucchigire! OP)
Shinsengumi - Bucchigire! OST
BUCCHIGIRE! (Main Theme) - Bucchigire! OST
Sogen and Suzuran - Bucchigire! OST
Way of the Sword - Bucchigire! OST
Sunny Japan - Bucchigire! OST
Akira and Katsura - Bucchigire! OST
Raid - Bucchigire! OST
Danzai Democracy - selfish-being name-less (Bucchigire! ED)

Sources for Historical Reference:
Katsura Kogoro Information and Ikedaya Incident Quote in Video: https://en.wikipedia.org/wiki/Kido_Ta... (NOTE: He changed his name later in life.)
Ikumatsu History: https://ja.wikipedia.org/wiki/%E6%9C%...
Ikedaya Incident in Detail and the Precursor: https://www.touken-world.jp/tips/57196/
Ikumatsu Hiding Katsura Theory: http://mglory55.blog.fc2.com/blog-ent...