The Invisible Man and His Soon-to-Be Wife Vol. 4 by Iwatobineko

BLIND TO EVERYTHING, EXCEPT FOR THIS!Tounome, the kind and dapper invisible detective, and Yakou, the shy and bashful woman, are as lovey-dovey a couple as it gets. Between clumsily asking for kisses and sleeping over after a long day at work, Yakou has kept the butterflies in her stomach plenty busy, but Tounome seems like he's getting cold feet... Will a heart-to-heart clear the way for them to travel through life together, or will it force them to part?!
Binding: Paperback / softback