How to Speedrun the Assassin's League with One Life [Western Crossover]

How do you avoid getting killed when you land in the League of Assassins from the start?

Answer: No problem, just summon a Grand Assassin!

After transmigrating, Kalai discovers he's become a low-ranking assassin in the League of Assassins, with his head on the chopping block at any moment.

Luckily, there's a way out. The world grants him one chance to summon a Heroic Spirit. What he gets is up to fate, and even a Craft Essence would be one he drew himself

"I answer your summons, Master. Servant, Assassin, Azrael. I shall begin my inspection of this place at once."

...Mom, I think I just pulled a gold and summoned the ancestor of all assassins.

Damian notices that one of the young assassins his age is especially strange.

The boy has the strongest abilities and talent of his generation, yet a far too innocent and lively disposition for the League of Assassins. He seems to have been spoiled rotten.

To uncover his secret, Damian appoints him as his personal sparring partner, making him the legendary companion who studies alongside the prince.

And a few years later, he bundles the boy up and takes him to Gotham too.

Kalai: O.O

What, me?

[Reading Guide]

1. This little guy in the mountains is so adorable! Help me up, I can keep doting on him for another ten years!

2. There will be multiple endings. The confirmed pairings are King Hassan Lily and Damian. The other guests are lining up.

3. Please don't expect anything from the protagonist besides his combat skills, and even those may not be his own or King Hassan Lily's.

That's right, he's not very smart. He really is just an unlucky transmigrator with average intelligence and social skills, barely passing the standard.

4. The might of the Grand Assassin! The League of Assassins has run into their ancestor this time.

Theme: When three walk together, one can always be my teacher. I choose what is good in them and follow it, and what is bad and change it.