A Handbook for Raising Girls from Another World

Caleb is a time traveler. After becoming an adventurer, he awakened the "Partner Cultivation System". After each kill of a monster, the system will accumulate "nurturing resources" exclusive to the bound partner, and he can decide how to allocate them to his partners. In order to allow his companions to accept this 'gift' of unknown origin calmly, he designed a 'system' for each companion that was more suitable for the physique of the natives of the other world - the gods' awards. He can actively issue "system tasks" to seek help from his partners, or passively accept the kindness of his partners. In return, his partners will receive improved abilities. [Your partner Caleb seems to need your help with his luggage. [Available rewards: slightly increased strength. [You bravely help your friend Caleb fend off the attack. [Reward: Defense slightly increased. ... The cultivation resources obtained by his partner will give Caleb a corresponding ability improvement based on the binding compatibility (up to 100%). To do this, he recruits partners based on the compatibility given by the system. But after Caleb bound one partner after another, facing the female teammates with different personalities and outstanding looks in the team, he couldn't help but confirm the name of the system. "Is your 'partner cultivation system' serious?"