A Man with a Thousand Skills Started as a Summoned Beast in a Different World! (WN)

A troubled middle-aged salaryman is summoned to another world as a summoned beast. Though lacking any notable talents, he ends up working as a retainer to a beautiful knight due to a shortage of manpower. This is an isekai romance adventure fantasy depicting the protagonist, who gains new skills with each summoning, traveling between Japan and another world until he is united with his beloved.