つつぬけすいかずらでしょう
突抜忍冬でしょう
tsutsunukesuikazuradeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of つきぬきにんどう

1. Probably lonicera japonica.

Polite
Presumptive
Conjecture
Usually Written in Kana